Can anyone tell me what that last bit is about? I can’t remember what it’s related to

The man with the black hair was a sex partner of chan-soo, tae-seung’s other right hand man the blond one that was after soo-young. He stopped having sex with him so this guy is trying to replicate their sex with some random kid. He wasn’t the dom tho so he has no idea how to safely choke someone.

Oooooh! Ok! Thank you so much! Eeek, that’s scary