That gives me time to shower and dress. Sometimes we chat a few minutes, and that's nice. I usually book 2- or 3-hour sessions, though, so "overtime" isn't all that important to me. I mean, it has to end at some point, right?

Good Question, Carla...

I would never consider going over with seeing someone the first time.  to me that would be very rude and disrespectful.   Just like I hate when I book a time for 1pm, and the lady isn't ready until 1:45... that's rude, and disrespectful of my time.

Now if it's someone I've seen a few times, I would expect a little more flexibility with the time.  But we're only talking 15 minutes or so.. and it depends on what else is going on.   Usually for me, I have snuck off from work, or on the way, so tend to have more of a time constraint that the provider.  I have one lady that I'll book a halfhour... but with showers on each end, it's 45 minutes.  With my favorite lady, who I've been seeing pretty regularly for more than a year now, I think I could stay and play for a few hours, and she'd be fine with that...  I'll have to ask about that sometime.

I think in general one should stick to the agreed time with 10 minutes or so leeway on either end.  I hate it when I am being rushed out early and will not repeat  if that happens.   Everyone should understand it's a business, and your time is your time, but the  less it seems that way the more enjoyable the experience.

..and it should never be expected, much less demanded!

I have met several ladies where the chemistry was wonderful (you know one of them very well, Miss Carla!) and I hung back after the session to chat a bit, but it was always at the providers discretion. I never expect it, but when it does happen I remember it like the special moment that it is - a provider who is now OTC and hanging out with me like a friend would.

Case by case  
Some ladies are very generous with their time, some are not.
It's prudent for guys to always respect the agreed upon time, and not overstay your welcome. If you book for 60 min. ya better start to saddle-up, 5 or 10 minutes before the hour is up.  
BUT, let's be honest.  Guys love it when a lady voluntarily gives them extra time!
Most of my regulars do... time permitting.  
And it's very gratifying, when a new lady extends her time. A repeat visit is guaranteed.  
On the other hand:  One of the worst things a provider can do is cut a guy off short before the time limit has been reached

Most of the time, I am not a clock watcher unless I have to be somewhere.  With my favs I enjoy the visits and never watch.  If I am not enjoying my time with a guy then I will take a peek at the clock.  Sometimes men take advantage.  I had a new guy before and let him stay over 1 1/2 hours.  I figured for someone new it is nice for both of us to get to know each other.  The next time I nicely asked him at 1 hour if he wanted to extend our session and he got all mad.  Said something like "last time you let me stay for 2 hours!"  Most guys are true gentleman and are respectful of my time.  Thank you very much to you guys who do this!

Like the ladies say:   "Never Expected Always Appreciated "

on all those times at my favorite Italian cafe in Capri where I fear I may have lingered too long enjoying cannoli and espresso... or just cannoli.