Then he must be bi. Nothing wrong with that. I'm not bi so I don't know what that's like. But I wouldn't think you'd have to live your life like Dr. Jekyll and Mr. Hyde--in his case, fighting the gay menace by day and then turning into one at night (or whenever the gay demon seized him). What a wretched life.
Now watch him (as other blogger(s) have mentioned) go into some Christian soul-salvaging program to fix him when what what he probably needs is a good psychologist.