From past experience with the ladies, a little drinking to relax and a lot of lube is a big helper. You also can't just shove it in there. You gotta have him work it up a bit or it's gonna be really painful. Make sure to be in a comfortable position, and don't be afraid to tell him to take it slow or to stop all together. It may not be your thing, but if you're willing to try it, just relax and get lost in the moment. <3 JD
I think the comments you got above are excellent. I don't have lots to add, but I'd just say everyone's erotic zones and pleasures are different, and don't let anyone push you into something that doesn't work for you. If you still want to try, start with a nice warm shower with your partner and try some oral/anal fun. It doesn't involve penetration but is still lots of fun. If you decide to go all the way: use lots of lubricant, try the side to back position, and try to relax the whole center of your body and feel open and accepting. But don't hesitate to say "stop' if you need to . Good luck.