Hmm, I've never seen performing oral sex as being submissive, necessarily. It can be a quite active act; aggressive even.

Characterising gay men who like to suck dick as "submissive" is harmful. And therefore homophobic. Fellating someone is not being submissive, getting fellated is not dominating. It can be, in a dom/sub context, but it is not in itself an act with a dom/sub dynamic and characterizing it as such leads to people seeing gay people as more submissive, effeminate, and, in a patriarchal society, therefore as lesser. This whole "the person getting penetrated is the submissive part" as if they're "letting it happen" or are doing it for the benefit of the other party needs to die out. It's sexist and homophobic. I don't need to dominate my partner when having sex with her, nor do I need to submit or be passive or whatever when fellating her.