sexual liberation, maaaan.
The way I see it, as long as the proper precautions are taken, ANY sex act can be enjoyable and clean. I, for one, am a fan of anal play not just with my female partners, but myself as well. I know the ins and outs to cleaning yourself for that kind of thing and, much as it may be psychologically gross, physically it's not much different than the mouth or vagina. Besides, as a guy who happens to enjoy the sensations myself, I'm quite sure females can get pleasure from it, too (read: duh, of course they can), and sometimes it's not about you. When you love someone, you make compromises for them, and if the lady likes alternatives, then go wild, just make sure to take proper precautions first.
also, I know you're just expressing your dislike with it, and as such it's an opionion, but "it's disgusting" doesn't come across as "I don;t like it", it comes across as "it's despicable and i judge all those who do it." Not saying that's what you meant, but to someone who happens to enjoy it, the word usage certainly makes it seem judgemental.
anyway, just make sure to educate yourself. If you still don't wanna do it, I certainly won't tell you how to enjoy your sex life, but when it comes to pleasure, you gotta keep an open mind, you never know what you'll like. hell, some people I know get off to the taboo of it, they LIKE that it makes them feel dirty, even though the sensations themselves do nothing for them.
My Console Library:
PS5, Switch, XSX
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android