It is partially under voluntary control, and partially reflexive to stimulation. I think more women should investigate the long term potential dangers of prolapse before they engage in anal sex. It is also possible to get pregnant through anal sex if semen runs out of the anus into the opening of the vagina, which is not far away—which is another good reason to use a condom. Choose what's best before you start. Since the anus is not capable of producing its own lubrication as the vagina can and the tissue of the anus is very fragile, it is important that additional water-soluble lubrication a variety of brands are available at drugstores be used during anal sex.
Are there any risks?
25 Tips to Enjoy Anal Sex From Someone Who Loves It
If anyone did hurt themselves through using it, I hope they sued the hell out of the company. Buttfucking makes it sound crude and dirty, sodomy sounds technical. Consider how big your penis is and realize that two fingers is probably enough. That is what you should do: Relax, but yes it might hurt a bit. Eventually you will both be ready for more. To take further precautions, use a condom during anal sex, and change it every time you switch to vaginal or oral sex and back.