Boundaries

There's this movie... I forgot what it was called, but the name wasn't in English. It was about two brothers who fell in love. As a gay man, it is right for me to say incest is wrong? Or pedophilia? Or any form of "love"? Wouldn't I be a hypocrite if I said that those forms of "love" don't exist or are wrong? Are some more accepted than others? If so, why?