Alright, well I'll first apologize for the obscene topic. I'm new here... =_=;
The scene plays out with the man and the woman naked, cuddling with each other. The man says コイッスの時間は大体の標準では……若い年令で8分ぐらいだろうで…
So does the word コイッス refer to "sexual intercourse"? I want clarification for this, please.