Is the wife considered divorced from her husband if he has anal intercourse with her? What are the harmful effects of anal intercourse for both the man and the woman?
All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
Anal intercourse is something disgusting for the sound Fitrah and unlawful under Sharee‘ah. But it alone does not result in separation between the spouses, neither by divorce nor by repealing (the marriage contract), so long as they stop repeating it and repent to Allaah Almighty of it.
But if the husband does it habitually, and the wife obeys him, then, they should be separated according to Sharee‘ah.
Shaykhul-Islam Ibn Taymiyyah said:
Once he has anal intercourse with her and she obeys him, both should receive Discretionary Punishment, otherwise (if they persist) they should be separated just as the master and his slave with whom he commits immorality are separated.
If the wife failed to prevent her husband from that crime, or avert him by force, she would be considered to have helped him do so.
There are lots of harmful effects caused by this crime, beside its being unlawful and loathsome, all of which are mentioned in the books of Fiqh and medicine. For example, it diverts the man from having sexual relations with the woman in the natural way, to the extent that he might become unable to have normal sexual intercourse with her, which removes one of the most important fruits of marriage, i.e. producing offspring. It also has a negative effect on the genitals, i.e. the main centers of producing and ejaculating sperm in the body, kills the spermatic vitality in it, and distorts the structure of the substances from which the semen is composed. It also affects the brain; causes melancholia; and results in muscular relaxation and, consequently, rupture of the rectum, in addition to other mental and physical harmful effects, as mentioned by Sayyid Saabiq in Fiqh As-Sunnah, adapted from Al-Islam wal Tibb by Dr. Muhammad Wasfi.Allaah Knows best.
You can search for fatwa through many choices