Is it permissible for a wife to acquire an artificial phallus for her husband to use to pleasure her, given his inability to sufficiently satisfy her sexual desires?

It is not permissible for a woman to use an artificial phallus, whether with her husband's permission or without it, and she should not even contemplate it. The husband, on the other hand, should seek treatment for his sexual weakness from specialized doctors. If the wife is harmed by the husband's illness and his inability to fulfill her sexual needs, she has the right to seek divorce to alleviate the harm from herself. Sheikh al-Islam Ibn Taymiyyah stated that a husband's intercourse with his wife is an obligation according to what is customary, and the soundest opinion is that it should be in accordance with her need and his ability. If he does not divorce her, she can refer her case to the ruler to compel him to fulfill what is obligatory.