Re: questions about anal
Well, if you and your gf have a monogamous relationship, I think it's only fair to talk to her first before involving another partner. However, I wonder if it's having sex with a guy that arouses you, or just the thought of receiving anal. If it's the latter, maybe buy your gf a strap on, and check out the movie "Bend Over Boyfriend" ;-) If you do decide it's the guy that matters, I urge you to always make sure he wears a condom, because receptive anal puts you at the highest risk of contracting HIV.
Oh - and none of this is abnormal at all.