in all seriousness, i do believe yosuke has/had romantic feelings for yu. (not saying it’s 100% true or they were mutual) but even if they are just good friends,95% of me thinks yosuke MANIPULATED him into doing gay stuff with him, we all know Yu's straight, so it definitely wasn't because he wanted to-Yosuke probably send some brainwaves into his head that messed up with the way he was feeling about men and etc.