I stopped working on girth gains when I reached a girth of 6.3", and believe it or not, I still get anal every so often when my girlfriend is in just the right mood. Did it now and then with a previous girlfriend, too. Probably not as often as I would if I hadn't made those gains, but it still happens nonetheless. And neither of them has/had any health problems associated with it, apart from some slight lingering soreness the next day, and sometimes not even that. The sphincters won't get permanently stretched if they're relaxed enough before you start and you go very gently and gradually pick up the pace.
The poor girls you've seen in porn have got that way from having anal sex very often, very roughly, for long periods of time and often by taking things other than dicks up there, such as huge toys or even fists. Doing it for five or ten minutes at a time every few weeks or months, with loads of foreplay, preparation and lube and with a sensitive and caring partner is a very different proposition - even if he does have a big girth.
I never really understood why guys like anal. Maybe if it is tighter feeling but if your girlfriend already has a tight vagina then I don't see why the need. Unless your girlfriend likes the feeling of anal sex. You can pleasure her with a small dildo.
Well the tightness is one aspect, another is that it feels hotter. Mainly it's just the thrill of doing something kinky and taboo. Believe it or not it also feels a lot more intimate than vaginal sex, perhaps because of the trust needed to give someone access to such a sensitive part of your body. (Which makes it all the more ludicrous that some young girls think they can preserve their "virginity" by having anal but not vaginal sex - sorry sweetheart, but if you've had a dick up *there* then I would say you've got
less virginity left than your friends who've had vaginal but not anal sex.)
And yes, a lot of women do really enjoy both the physical sensation and the psychological turn-on. I think it's quite rare for women to be able to orgasm from the penetration alone, but with clitoral and/or vaginal stimulation at the same time a lot of women say they can have orgasms even stronger than those from vaginal sex.
All I can suggest to the OP is to read the suggested threads, ask his partner to perhaps suggest the next time she's in the mood to try it, take it really slow and gradually and stop at any time that she feels she can't cope with it - that way she'll be far more inclined to try again another time, and you might be able to go a bit further. Also, at the risk of stating the obvious, maybe stop working on your girth!
