Why was he so angry about the uke being bi?

Ig he just thought that he was fooling around. Like ppl always talk abt “bicurious “ ppl and he prob thought that the like heard what he said and was trying to take advantage of him for a one night stand

he wasnt angry? he's probably just seen people in the past who weren't really, and obviously he quickly found out he was actually bi, i think(?) he might have apologized for that, not sure tho