For the sake of discretion, I (and many other providers) stand behind the door as I open it for an arriving guest.

I always thank the young lady for opening the door. I don't like standing in the hall waiting. Discretion is best. Please open the door.

I’ve made similar comments before to bring a little humor into the appointment. I understand the reasoning behind it and try to lighten up the nerves. Even if someone doesn’t understand the reasoning, I highly doubt they are saying those comments to mean harm. I think you’re thinking too much into it

Plus, I've met enough clients who made jokes about that who then proved to be disrespectful in general that these supposedly light-hearted comments now cause my guard to go up.  

but when light hearted comments like this "get your guard up" perhaps it's you that is starting to get jaded?

But this must be the most over-sensitive post I've ever seen you write. Why do you care what the motivation is behind a lame effort to break the ice? And why do you assume it has a negative connotation?  C'mon!

I think some guys are just nervous. I totally understand. Before I started doing this I had seen a few providers with an ex of mine and I'd always be nervous in the beginning that the person was opening the door like that and then would ambush me or something... I suppose I listened to too many horror stories lol.

That's my point.   A high percentage of those who've joked around about this have then gone on to be unpleasant and even downright disrespectful, pushing boundaries, in the session.  
So when there's a pattern like that?

and almost all experienced guys expect it. I don't see a bunch of ladies chiming in agreeing that they are having the same problem, so it must be you.

Many of us have visited others with explicit instructions, "DO NOT KNOCK. DO NOT RING. Do not make noise." This is the rule at most AAMPs (apartment AMPs), indies in residential buildings, and even some hotel hostesses. The first time the door opens exactly as you set foot on the Welcome mat seems magical!  
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I guess we associate good times with the magical door opening that we continue with that. That is even though we know about peep holes, closed circuit camera systems, and other ways she can know we have arrived. It is part of the program; it is fun; it is enjoyable; it is memorable.
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It is part of the experience. It is a distinguishing positive. When we visit non-hobby friends for non-hobby activities at their "in calls" we knock; we wait; we bang on the door and get ignored; we shout, "Hay! Hurry up! The ice cream is melting and the pizza's getting cold!!!"; finally, the door opens ... to a non-hobby experience. No magic.

"Light hearted" comments often come from passive aggressive type people.   aka "haha only serious."  As you noted they are often disrespectful throughout.

But we strayed from my orignal question, which was simply prompted out of curiosity.

As for myself, I don't ever remember joking about this, I pretty much expect it, and I honestly can't remember the last time I had to knock at the door of an incall. That's what the whole "two call system" is all about, right?

It didn't matter if it was at a hotel incall or an incall at their private residence. They want their discretion which I see no issue with. Besides,  sometimes she's scantily dressed which is even more of a reason to be behind the door. I like the excitement and prolonged anticipation of seeing her once the door closes and I turn around to greet her.

In Las Vegas and everyday was groundhogs day. I had to laugh and smile and pretend not to have heard their joke or comment about "You gonna give me blackjack,sweetheart?" for the umpteenth time that day. At least in this gig the gentleman/ladies are giving us their hard earned dollars and it's allllll yours. Smile and shoot back with soemthing equally benine. See it for what it is...trying to possibly break the ice in an already awkward situation. Open the door and pop and say boo next time.  

I expect and want the door to open by magic.  Nothing worse than having to knock, unless it's having to knock twice because she was on the phone or something.

Based on the OP and some of your responses, I really think you're overreacting and need to give yourself a timeout. Lumping guys (who are probably a bit nervous themselves walking into a new situation" together as unpleasant and even downright disrespectful, suggests to me that you're on the verge of burnout.

I like the "hello kiss" to last and last.    All those awkward getting-to-know-you questions can feel so interview like they can actually make me MORE nervous lol.  

that you have to knock on, to the door left ajar so the client doesn't have to knock at all.

I think the gentleman are just trying to make you laugh. Usually stupid stuff makes us laugh. It’s an ice breaker.

I actually watch for my guest's arrival and open the door as he approaches.

is not something I would say to a lady, especially you as your etiquette page on your website provides a good expectation when visiting with you.  I may say something else goofy, but would most likely be in awe of your beauty as we hug and kiss to get to know one another.

I still think it is a very neat trick to get the door to open like that. It feels so good when I do not miss a step entering the lady's domain. There is no stress on my nervous heart when I don't have to think what to do next. I make sure nobody is around but would it be weird to onlooker if someone just walks straight through a magic door without knocking or greeting?

....... I'm so excited that I forget that the door could magically open. It comes under the "only so much blood....." thing.

Ladies, please forgive us. I lose my mental capacity as I approach so don't judge us in the first few minutes. I was laughed at by some ladies as soon as I walked in because of my confusion. That's fine because I love to see the ladies laugh. My brain gets a little more blood when I see her so I have never said anything that may be misunderstood. In the occasions where my brain still gets no blood because she is too hot, there is no need for small talk in that case so I am still doing ok.

...keep the door on the hinge (or lock) instead JUST before they are about to come up.
And almost nothing more cringey than them coming in and letting it slam LOUDLY on the hinge/lock.  And they can see it resting ajar on the hinge...oy vey *shudders* lol.  

Start off sucking face and leave the talking for later. Glad to hear at least one provider feels this way.
I didn't feel anything wrong with your original question and what I got was that initial small talk may be awkward.
Thanks for explaining your point patiently but I got it when I saw it. I doubted this was intolerable for you, but rather "not this joke again" kind of thing. I found your OP educational. I didn't read it as whining or being jaded either, more like "don't make lame joke or state the obvious to Debra as an ice-breaker" kind of thing. That was what I alluded to when I said I have never said anything that might cause misunderstanding like this.

that there may be grown men who believe in magic.  These few will seem genuinely impressed by small acts of legerdemain.  

and they can make my dick rise with a simple glance. lol

1) for your discretion.
2) so that at a hotel, it gets us men in the room faster.

I have never made the comment. I also think you're taking it the wrong way. Its just a nervous reaction, and most assuredly just an automatic reaction to an event. They aren't mocking or making fun of you.  

99% of the time I do outcall. It’s really all I’ve ever done. Trying to walk in and look like I know where the elevators are, standing in hallways waiting for doors to open it’s all nerves. I LOVE when I don’t have to knock. When the door is left ajar. Some guys do the magical opening door too. SO MUCH better than standing in a hallway with people walking by.  

Deb, you have been around for a long time and I really respect you (I also read ALL of your website and have used many of your "tricks" for my hotel stays) I have also seen some of your clients and they have nothing but amazing things to say about you...  (rescue dogs, anyone????  .    
I dislike when anyone says anything negative or condescending.   I normally stand in the bathroom when a gent arrives, but if Deb likes to stand behind the door and open it, that is her.  She has been in this business long enough to know what works for her. I hope to someday be a legend like her.  
Best of luck, my dear!!!  

I stand behind the door too, as no passerby in the hallway needs to get an eyefull of me all sexy glammed up...