So I've kind of had to adapt to satisfy him - ultimately his pleasure is far more important to me than whether I'm hard or not. So now he usually has me jack myself off to orgasm while I'm getting clean and ready for sex, which means I'm usually totally soft for him. It took quite a lot of getting used to doing things in that order, and it was a bit uncomfortable at first, but I now totally love the fact that I can just concentrate on his big cock inside me, and devote myself to giving him as great an experience as possible, without having to worry about my own arousal, or interrupting things by cumming.
Afterwards, I'm usually quite content just to enjoy that incredibly satisfying feeling you can only get when your ass has been well and truly fucked by a gorgeous guy, and filled with his sweet cum. Sometimes he jacks me off afterwards, but mostly he just settles down and cuddles me. So I suppose the satisfaction I get from anal sex now isn't really focused on my own orgasm but on the pleasure of his cock filling my hole to bursting, and on seeing and feeling just how much enjoyment he's getting from topping me. He loves that, and so do I.
(Looking back I'm kind of embarrassed how selfish I was at times in the past when bottoming to be honest! I used to always stop guys from fucking me once I came, which thinking about it was really unfair

)