I get offered this a lot (I have a black girl butt, so a lot fo butt fetish guys approach me), and the few times I have ATTEMPTED to have it, it sucked, mind you this was well over ten years ago when I last tried to. 19 and 20 year old men don't think maybe just maybe an anus would need lube, and try anyway, and it is very painful. Approach the issue slowly, and then offer to make it comfortable as possible. My experiences with men who had no concern about my comfort, totally turned me off from it. I am just now getting to the point I would have someone try it very carefully and slowly.