Husbands are asked to satisfy the sexual desires of their wives and vice versa although greater emphasis is placed on male sexuality.
As it is attributed to Muhammad:
* "Not one of you should fall upon your wife like an animal; but let there first be a messenger between you." "And what is that messenger?" they asked, and he replied: "Kisses and words."
* "When one of you have sex with your wife, it is a rewarded act of charity." The companions were surprised and said, "But we do it purely out of our desire. How can it be counted as charity?"
Muhammad replied, "If you had done it with a forbidden woman, it would have been counted as a sin, but if you do it in legitimacy, it is counted as charity."
* "No solution is ever better for two people who are in love like marriage."
Also in hadith:
* If a man invites his wife to sleep with him and she refuses, then the angels send their curses on her till morning. Sahih al-Bukhari, Vol. 7, No. 121-2
* When a man sends for his wife for the satisfaction of his need, she should go to him even if she may be occupied in baking bread. Reported by Al-Tirmidhi and Nisai, No. 284.
www.en.wikipedia.org/.../Rights_and_obligations_of_spouses_in_Islam