From "Peep Show: Mugging (#3.1)"
[Jeremy has gone to Michelle's to have a threesome and unexpectedly finds Big Suze there, but it turns out she's only Michelle's new lodger and the person who's really going to join Michelle and Jeremy in the threesome is some frumpy, unfriendly woman who won't even speak to him
] I will have had a threesome. I will have had a threesome.
So, Jez. A threesome. That'll be nice. My friend Jen did a threesome once, she said she cried for about an hour afterwards but I'd still definitely like to try it sometime.