Too Big

I let my current friend-lover fuck me over a month ago for the first time. Quite frankly it took almost an hour and a lot of pain for me to accommodate him. I didn't realize he was so big. He is about 9 inches long, and I'd had almost that length before, but not his width. It is perfectly round like a can of soda or beer and is 3" in width. It's too much. After he finished that first time I literally could not move. I was so sore, I've never experienced that kind of soreness before. He took almost 25 minutes that first time,so for 25minutes I was splayed out and stretched beyond endurance. I was having trouble sitting up, then walking wasn't too pleasant either. He insisted on going again and I couldn't, I sucked a while then finished him with my hand and some oil. It was 4 days before I'd go out with him again. He was begging me to go out, which of course meant, screw me again! I admit, it took a while, but I got used to it and then got really used to it, and like it. I was seeing another guy at the same time, and he discovered I was with someone else when he asked me about being so loose all of a sudden, I admitted and he couldn't stand the competition.

My current, admitted that he'd only had 3 other girls in his 29 years, most were scared off. I used my hands, my mouth, and my vag, only now he wants my butt too. I've had anal since I was 16 but nothing like his cock has been in there. I know in my vag I can get 4 fingers in very easily when I play with myself, before I used two. It hurt a lot when he entered me in front I really don't want to have that experience in back. He's getting insistent and has started using fingers on me back there. He's up to 3 fingers now. I really don't want to get so loose back there, what will it do to my insides? to my going to the toilet? He says he's never had anal sex, and I want to give him what he wants, he's very very good to me, and good for me, but . . . my butt?