Is it permissible for a man to have anal intercourse with his wife, and what is the ruling on the sin incurred by this, especially if he does not want to commit adultery?

Previously, the ruling on approaching one's wife from behind in the front, and the ruling on approaching her in the anus, were clarified, where the latter is never permissible. As for someone who has strong desires and is not satisfied by one woman, his only options are to seek a second wife or to fast.