It’s not something he does often.

Kurt is being anonymously manhandled. Guess who's behind it.

How to improvise and always say, “yes and”.

This was why he never went jogging after dark.

Glee.

Puck assumes wrong.

One thing Puck does very well is going down on girls, and while Kurt might technically be a dude, he's still dressed like a girl

Prompt from some awesome Anon in the fic meme:Kurt's asexual; but he finds himself romantically attracted to Puck. Problem is he sees Puck as a highly sexual person and he doesn't think Puck would be even slightly interested in a relationship with a nonsexual partner. So Kurt tries, very awkwardly, to initiate sex. Puck realizes halfway through Kurt's not really into it. Cue confrontation and (eventually) a happy resolution. (And maybe Puck being offended Kurt didn't give him the benefit of the doubt.)