Anal is something that has to be gradually taken at first. For one, the muscles in that area are always, always clenched, and it takes almost as much concentration as one attempting to center their chi(Not my religion but I know how hard it can be from people who have explained it to me) to relax those muscles to where it doesn't hurt as much. There will still be pain involved, but if the muscles are not completely against invasion, then the results will be a lot smoother. Just as the vaginal opening, the anus will contort and adjust to what's inside it, however, again, this takes practice. It's not something to be just jumped into. There are serious complications that could form from anal play that is too rough on the sphincter, which is the muscle that closes the outside of the anus. So again, if you are curious about anal play, I would strongly suggest making sure the individual you are experimenting with realizes that this is your first time, and you need it taken very, very slow. Like suggested, fingers before a penis or large toys is definitely a good way to start.

I personally enjoy anal, I've done anal on several occasions in real time. These are my personal findings on the subject, both my own experiments, and taking the time to look up what could theoretically happen with forcing it when the muscles specifically say 'no, I don't want anything there'.


Disclaimer; I apologize for being so detached and dry in my words. Just trying to explain it on a level where everyone can understand.