What did the Messenger of Allah (saw) say about a man and a woman sharing one covering?
 'Abd al-Rahman, the son of Abu Sa'id al-Khudri, reported from his father:                      The Messenger of Allah (may peace be upon him) said: A man should not see the private parts of another man, and a woman should not see the private parts of another woman, and a man should not lie with another man under one covering, and a woman should not lie with another woman under one covering.