I had never done anal before either. It was very weird. We were having really rough sex from behind for like 45 minutes. She came over and over again and I guess got really excited. She was like, "Let's stop for a while." Then she grabbed my cock and just slid it right into her asshole. Well not completely. We got the head in, and had to spend 2-3 minutes getting the whole thing inside her. It was so different. Really tight and dry, but once we got the whole thing in it got slippery. I'm not sure if it was ass juice (excuse my terminology) or my precum... We tried it again the following evening. I'm not really a fan, but she loves it because of how dirty it is. Hehe, I love my girlfriend.