I know people can have freaky imaginations....but this DOES actually happen!
My best friends younger brother was at a small club one night....just hangin out with his buddy, who was talkin to some girl. So this other girl approaches my buddies bro and starts a conversation...then inviting him over to her table, where her boyfriend was sitting. To make a long story short....they propositioned him to go home with them. (the dude knew what would happen.) So they all three left to go to the couples home. These were "normal" people who lived in a nice suburb, etc.... Basically, the bf watched while the girl sucked off the dude. Then she took him into the shower where he fucked the shit out of her..ass included....licked his asshole, etc...again, while the boyfriend watched. Finally, they had a 3-way in the bedroom, double teaming the girl. My boy's bro said it was the most incredible night he has ever had. He said this couple had obviously done this before, but said that they were pretty cool, and made it real comfortable for him....meaning that they appeared to be perfectly normal people.
Anyway, the night ended after about 2 or 3 hours or so....when they drove him back to his car at the club..........thanked him for his service, which they were VERY appreciative of....and went on their way. They did extend him another invitation, but he said that this was his first time ever doing anything like that....and although it was awesome.....it was just a new adventure for him, that would never be repeated. End of story....but true to fact.