I wouldnt call it humilating but I lost a bet to my ex girlfriend.
We were fucking for this guy on ... and I bet her she couldnt get the guy to come over to our hotel room.
If she won, she can do whatever she wanted with the guy, If I won I got to stick it in her ass
Guy came to our room with 45 minutes and before ex got started she says "My boyfriend said if you come over he wants to suck your dick and I want to watch. If either of you back out, neither of you get any pussy tonight"
Guy looked at me and unzipped his pants and said "cmon man, dont fuck this up for the both of us, start sucking...."
I opened up and he shoved his cock in my mouth