[ There it is again. Before Yosuke had just been curious, but now that he knows what it means...

Yu's embarrassment, being flustered, all of it gives meaning to Yosuke that wouldn't otherwise be there. The thought that Yu could feel the urge to mate, voluntary or otherwise, just by touching him is strangely exciting. The fins at the sides of his face flare outwards.

Still, he has to laugh self-deprecatingly. Clarifying is even more embarrassing. ]

Sh-shit, uh...I was just gonna say that...um...it's not like...I mean, we're different, but we're both...boys...y'know?

[ They can't fertilize any eggs, Yu. That's what he's saying. It's...innocuous. As much as it can be. ]