Responses

I'm mostly assuming here but it may mostly be because it was a public establishment wherein others are clearly still present & could come in at any time. With public decorum and all he may just not comfortable with the idea of others explicitly doing private things in public spaces (eg. Sex) and think it's perverted. Tho honestly, I dont get how he could think that that was sex when the only thing he heard was the moaning (and maybe le fapping).
Am I the only one wondering what’s the uke’s problem with the seme having sex in the toilet like dude it’s not your damn business don’t judge and like mine your business wax boo...