Humaid Himyari (may Allah have mercy on him) says that once I met a companion of the Prophet (peace be upon him) who had accompanied the Prophet (peace be upon him) for four years, just like Abu Hurairah (may Allah be pleased with him). He did not say more than three things to me: The Prophet (peace be upon him) said, "A man can perform ghusl (ritual bath) with water left over by a woman, but a woman should not perform ghusl with water left over by a man. Do not urinate in the bathhouse, and do not comb (beautify) yourself every day."