This reminds me of the time I went home with a lesbian couple after a party, and not realizing they were interested in sex with me, even after dropping hints like repeatedly telling me things like: "You know, we've both been with men before", then while awkwardly watching a movie on their couch they started to undress eachother and make out, and one girl pulling me in to touch her body as the other girl moved to perform cunnilingus on her.

And all I could think was: oh wow I should probably give them some privacy now, I guess it's time to go home.