WASHING

Allah has ordained that ghusl should be carried out
(a) after sexual intercourse (meaning penetration of the penis beyond its head), or whenever an orgasm has occurred (in men and women);
(b) after menstruation;
(c) after post childbirth bleeding. (Suras 2:222; 4:43; 5:7.)
 (d) after wet dreams
This involves making a niyya, washing off impurities, cleaning the private parts, and then pouring pure water over the entire body and rubbing it at least once. As regards ladies' hair, three handfuls thrown on the head are sufficient; it is not necessary for the plaits to be undone. Warm water can be used; it is preferred to offer two rak'as upon completion.

The recorded sunna is that if a man wishes. to have sex a second time before he has carried out his ghusl, he should wash his genitals first. If he had a wet dream, or urinated, he should likewise wash them before having intercourse. There are, however, some traditions from A'isha that suggest that the Prophet (s) sometimes slept in the state of janaba without having touched any water.