Because most fem-brained bottoms are turned off when a man likes cock.

It just gives off gay and sissy vibes. I don't care how much you LARP as a "dominant straight top" if you are aroused by seeing cock you're a faggot. Especially if someone wants to be seen as a woman and their "straight" boyfriend is drooling at the sight of dick and balls? It's a huge turn off. You can accept it or not, just telling you how it is.