jammach: Moboy126,
Well, when I first started playing around with anal sex and toys, even a modest 7" dildo took time and patience to work it's way in and the first few times I slept with guys, it was pretty uncomfortable to say the least. Why I persevered, I dunno, but I'm glad I did!
I guess like most things, practise improves your skills. I have great control over my anal muscles and can let dildos and dicks pass through my second and third sphincters. The longest toy I can take is the Dick Rambone dildo, which is about 13" or so insertable length. This is raw, hard, unyielding latex, a dick that size is a bit easier.
I must stress that it is a matter of control though, not of merely relaxing to be loose and wide open. That wouldn't be much fun for the guy topping you! My anal muscles and rectum can stretch a fair bit, but i'm more than capable of clamping down on that shaft and giving the guy a nice tight tunnel to plunder.
Why do I do this? Simple, it feels amazing. Feeling something moving that deep within you, pushing so many nerve endings and buttons in your head is awesome. It leads to overwhelming orgasms. If I'm getting fucked and he's doing it right, giving me the whole length, out to the head and burying it balls deep, I can reach erection and orgasm without even touching my dick.
Unfortunately, men hung as huge as I like, are very few and far between, or they seem to be on a different continent ;-)
cheers,