Yes, there are many threads on this topic. Please do a search and you will find a variety of views from both men and women.
I have a varied sexual toolbox but allowing anal penetration is not in it. I do enjoy being rimmed and anal stimulation during oral sex. The anus, however, is designed as a one-way valve - to allow stuff to pass out but not in. The tissues of the rectum are one cell thick as opposed to the forty cell thickness of the vagina. That gives the vagina great elasticity but the rectum has little. The vagina has natural lubrication that allows thrusting comfortably; not so the anus and rectum.
I have been flamed before but will say again that tears always result from anal sex until the muscles and skin stretch. This opens the tissue for infection. In the long term (read age sixty not thirty) hemorrhoids are to be expected and bowel looseness may well result.
With your mindset starting out, you will undoubtedly tense up and make things worse than they would otherwise be for yourself.
That is my medical view. Many people here have other views. Please read them.
Brandye
Posted: 24 Sep 00:31