He's said something about it before along the lines of it being more socially acceptable for women to be bisexual than it is for men, particularly with leaders of lycanthrope packs, so I'm thinking he may indeed like men on some level, but repressed those feelings to the point of mild homophobia. Seems a bit deep considering what the series turned into now, but there was an actual plot when we first met him, so it wouldn't be unheard of at the time.