Miregal

I'd put down my 2 cent... And it will be purely in physical terms. Over the years, I noticed every ass is different just as every cock is different. And it comes down to largely 2 aspects. First is the size. Some are born with naturally wider, more expandable hole while others are not. Some has longer, good 10-15 cm sphincter while others much shorter than that. Some rectums, past sphincter muscle, can be more cavernous and empty, while others narrower and yet others somehow full of extra skin like a bunched up crushed velvet. Some are born with naturally stronger muscles all around (have an Irish friend who has a typical rugby player's lower body, and it's not just his legs that are muscular... I can fuck all my might, and he take it without a flinch). All these sheer physical dimensions will affect how it feels inside. Second point is the texture of mucous membrane. Just as our outer skin differ person to person, our skin inside also take on a character of their own. Some are thin and almost dry, others delicate and flimsy; some are thick and pillow and others are so plump that they feel like the surface of an inflated balloon. I have an unproven theory in this regard- that I can tell what kind of ass I'm going to get by getting a blow job. Even though mouth and ass are on the opposite ends, the mucous membrane often seem to share the similar character. Now, there is no right or wrong kind of physical character. After all it is all about how it matches the top's size, girth, curbiture and sensitivity. I'd just add some practical options for bottoms to consider if your tops struggle to cum inside you. Most obvious one would be training your muscles. And the key word is control not tight. Second is to try different lub options. As a rule of thumb silicon based lub would be less gloopy and leave cock bit more sensitive. I myself settled down with coconut oil, which I find to give just enough slip and not more... Not to mention cheaper than most lubs. Third is trying different positions. It's hard to say which position is the best because it really comes down to our different physicality, but changing the position definitely affect how it feels for both top and bottom. Last is to clean it out well. I know it's easier said than done, and I don't mind occasional 'accidents'... But faecal matter can be surprisingly effective lub. A guy I know has rather loose but still nice hole that wraps my cock around nicely... But he fails to preparing it clean 8 out of 10 times, and I can never cum when his hole is too sleak with shit. Anyway, that was just what I've been observing over the years.