In a 69 you are involved in mutual pleasure. Face sitting is domination. Telling/demanding that he satisfy you, with his tongue on your anus or vagina.  

Posted By: DebbieNoonerGirl

Someone I've met a few times asked me to sit on his face; the thing is, I already WAS... at least to my mind, as we were in a 69.  He kept repeating it: "Sit on my face!", "I want you to really SIT on my face!" and so on....  
   
 When we were done, he remarked that he really enjoys "face-sitting" and a light bulb finally went on in my brain!  Hmmmm, that sounds like it might be a particular thing, like a fetish sort of thing!    
   
 A quick internet search yielded only links to porn (shocking, right?!) and I'd rather have a verbal explanation.    
   
 Can anyone define this for me please?  Pretty please?    
   
   
   
 xoxoxoxoxoxo

From what I understand, you sit on his face so your ass is over his nose and your kitty is over his mouth.  You sit down on his face in this position so you can control his breathing.  Because you are covering his nose and mouth, he can not breathe.  All he can smell and taste is your anus and kitty.  Once his face starts turning red or he taps you to get off is when he can begin to breathe again.  Yes, its a fetish type of thing.

face-sitting can involve breath play, or not.
Face-sitting can be dominant. It can also be dominant with mutual pleasure; more often than not, you can learn control through keeping someone aroused.

Smothering involves breath play for sure.  

Normally when someone refers to "face-sitting", the term can be interchanged with "body/pussy worship".

If someone has requested this service, I'd ask what they specifically mean.

Thank you all so much!!

From the way he phrased it, and repeatedly stressed "Sit. ON. my face" and then "really SIT on my face" he was looking for something along the lines of smothering action.  

Incredibly interesting information, everyone, thank you so very much for explaining to this usually-very-vanilla provider!

For those who wondered, and asked, why I didn't simply ask him what he meant:  I DID!  
In the moment, I asked him over and over what he meant but he just kept repeating "sit on my face, I want you to sit on my face".....{ wait, wasn't that a line in a house/industrial song from 20 years ago??  A gay BFF of mine played it all the time!}

OK, back on topic! When we were done and he referenced "face-sitting" he then quickly changed the subject.  So I took that as a hint that he didn't want me to ask him about it.  

 
Thanks again!  
xoxoxoxoxoxoxoxoxoxoxo

my tongue knows the difference..

https://www.youtube.com/watch?v=KkJnd9rSAQ8