No it is important to protect us from the men who both like having sex with men and act like a homophobic hetero. Some of you will say things like don't label people, it doesn't matter. I guess you don't want your partner to be homophobic at the same time. They are not into men (sexually or emotionally) The only reason straight men are called as straight is If he loves and he wants to do this again, he is not straight anymore.
If he doesn't love, he continues as a stright guy. If a straight man wants to try gay sex (oral, anal, top, bottom etc) it is ok.