Friend: " . . . so you know my friend Janet, right?"
Me: "Uh, I don't think so?"
Friend: "I thought you met her at Dragon*Con last year."
Me: "Oh, yeah! I slept with her!"
(My sister and I had our friend-of-a-friend roommates - whom we had never met - flake out on us when we got there, so we were left with nowhere to sleep in the middle of a very busy science fiction convention. I was lamenting this to my friend, and his friend Janet happened to be there, and she let us stay with her overnight! Her husband wasn't getting to the convention until the following day, so she had the room to herself. Since there was only one bed, I did end up "sleeping with" her and my sister took the armchair. My sister's boyfriend was kind enough to let us crash in his room for the rest of the convention, and I didn't see Janet again after that first night. She was definitely really nice, though! And - as a footnote - I already got my room for next year's convention so I won't have to rely on friends-of-friends-of-friends not being flaky!)
DH did find it funny when I called home and told him I had been at the convention less than 24 hours and had already slept with a strange woman