because the bottom peed all over him and it got everywhere. although I wouldn’t doubt that the top peed inside the bottom I’m just shocked they didn’t show it. There’s are panels where the bottom is leaking yellow stuff in other chapters. I mean usually you talk to your partner when you’re about to pee inside them. Ngl I’m lowkey into that shit so I wanted to see it in a panel atleast, but this isn’t the first time the bottom has pissed himself.
it’s also really hard for a guy to piss and have a boner at the same time especially when you’re screwing something (talking from personal experience because imma dude)

I think it’s a typo because it’s always the bottom who pees because the tops dick is so big it hits his bladder. The slides showed the bottom squirting yellow stuff