How do you guys see the difference between top & bottom?

[JasonAndU]

Many people may object this but top/bottom are more than sex position to me. I know a gay couple means both sides are men, but I always feel masculine top vs. feminine bottom is the most “natural” combination. By feminine I mean relatively less manly (both mentally and physically), not sissy or anything weird. And a gay couple family, I prefer to see the top as the provider and the bottom as the homemaker, and the bottom should take the top’s last name when they get married. I consider myself a very open-minded person, but when it comes to this topic I’m somehow very bigoted. Is it abnormal that I think this way?