question #1 Sahih Muslim 338a, Book 3, Hadith 90 : What are the guidelines in Islam regarding modesty and privacy between individuals of the same gender?

The Messenger of Allah (ﷺ) 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.