Because beautiful women are powerful.
Nietzsche called women God's second mistake for a reason.
Women exist because men are too powerful. They're our weaknesses. They exist to balance things out.
I've tried to act in a dominant/aggressive way but being submissive is ingrained in my being. I was raised by a singe mother, I didn't have a father figure to teach me how to be a proper man and I only got interested in sex very late in life. I was very innocent before. I became obsessed with women and this obsession has become so big that femdom is my last stage.
But honestly, I don't care. If you have a fixed partner, a wife, I think it might be important to act as the dominant person in the relationship, but if you're only interested in sex, I don't think that's a problem at all. It's juts fantasy and you shouldn't be ashamed of it.