I love eating pussy and like licking a woman's ass crack after a nice shower, but my girlfriend wants me to eat her asshole.

I'm hetero and want to please her, but are there any dangers to such an encounter? I mean, isn't that like licking raw sewage? Do women really like having their asses eaten?

There's no clit down there, so what should I do? Lick around the rim?

Is there anything unexpected that could happen, aside from the obvious?