Some people do it o get the boys ready for the girls. To the winner goes the spoils of war kind of thing. Its an idiot move if 1 really hurts another. Yes males will combat each other for females. Does it make it right? No imho. That's like letting 2 male dogs fight over who will get to breed the female. OP your bps should be ok to take a couple quick group shots. If you don't feel comfortable doing it no worries. Good luck.