A biological man should not be alone with anyones children except his own.
Not that males are not capable of being reasonable humans, but it seems like the males who WANT to work with children for a living regularly get caught abusing them.
Just make society easy. No male coaches for girl's volleyball and no gay couples adopting boys.
Plenty of gay people adopt kids and don't abuse them. Using your logic a straight male shouldn't adopt a daughter.
Needs to be a way for these abused kids to report these heinous acts.