Well I mean first of all someone is shoving a thing inside of u that doesn’t necessarily belong there.
But curiously, THERE ARE NO TOPS. Okay maybe there are like 5 tops in the universe. In the gay male sex world, the top to bottom ratio is totally skewed towards bottoms. There are way more bottoms than there are tops. http://mygaysites.com/best-gay-fetish-porn-sites
Somedays you just don’t FEEL like bottoming, even if you are horny. Bottoming isn’t about just having someone put their piece in u. It’s about really W-A-N-T-I-N-G that piece all up in u. Two different sentiments.
Being ashamed of being a big old bottom. Even though 92% of gay men are bottoms, according to my ethnographic field research, lots of gay men are ashamed of it, as if there’s something less masculine about it. The majority of mainstream gay dudes are all about masculinity, and anything that eclipses that has got to go.
Even if you enjoy bottoming, sometimes you get stuck with an everlasting top and you are sort of over it and he is still going at it and you sit through it just so he can get off.