Is my foreign exchange student roommate gay or bisexual?
If you want to know if this guy is gay or bisexual, shouldn’t you ask him this question and not the rest of the world? Either he will say yes or no. Bathing and showing in groups of people is a custom in Japan. If you ever go to Japan, you will see bath houses all over the place. They do it to save water. Not because of anything sexual. Who knows, he may be more of a heterosexual than you are.