310.A man should not look at the awrah ²⁷) of the another man, nor a woman of a woman, nor should a man go under one cloth with another man, nor a woman with another woman.
(Muslim, Abu Dawud, Tirmidhi).
(The Lawful and Prohibited in Islam (arb: Al Halal Wal Haram Fil Islam) by. Yusuf Qaradawi).