So, it turns out my girlfriend really likes anal sex.

We had tried it before, just using some lube, and she was in tears afterwards. But when we used a butt plug to stretch her out a bit beforehand, she was moaning while I was thrusting into her ass.
That, combined with fingering her a bit at the same time, made her climax super-hard. Now, she can't wait to trying anal again!

So, how have /h/'s experiences with butt fucking gone?