first, Joshu is a motherfucker... BUT, he was thinking that Yashuo wanted to have sex with him, it is not a violation at all (well yes but he didn't mean to)
second, GOD LORD THE LIFE OF YASHUO WENT TOTALY DOWN WHEN MET JOSUKE
Although he is being weird, I'm suprised people are hating Joshu when said they loved Daiya in her arc when she was being a creepy annoying douche on purpose.