[TLDR] the sex starts at 5th paragraph :P
So I get an email from this guy I know: "Tomorrow I have a sex-date with this woman I've known for some time, she wants an extra guy joining. She doesn't want some random guy, but someone cool with whom you can have a chat, so I was thinking of you". I felt honored that he was thinking of me, and I've never really had a request like that, so I couldn't refuse.