What do I do about my cousin's hott friends?

Be arrogant. It shows you are above their pettiness. Say thing like “ Did you see enough” , Don’t you believe in knocking”. Be ready for their smart replies. For those that did not see enough tell them to get glasses because they certainly were staring long enough to take a picture. Be ready with smart replies when they make comments. Men do not like their manliness challenged especially by a girl. Telling one of them to back to the internet where they usually get their cheap thrills is emasculating and makes the other guys focus more on the one you insulted. Telling them it’s the best they’ll ever see is also a way to downplay what happened and insult them at the same time. Insulting one at a time rather than the group again will take the attention off of you is a challenge and it takes courage to fight of the wolves. Now if you really have courage walk out in a towel and ask them if any of them missed the show. If you get a yes. Flash them and turn around and go back to your room. It will drive them crazy and gain their respect for being so forward.