Keep in mind that a major agenda of the Left is overcoming the fatherly instinct to protect. Why? Because it's empowering. It's a justification to use force and potentially be violent in a limited scope. Well, the Left wants the state to have the sole authority to use force, so they want that instinct squelched. If it's squelched, then the father isn't going to be interested in actively protecting his daughter. He'll rely on the state to do that, and if the state says his daughter will be ok if she's naked and vulnerable with a naked dude in the room, the father will accept that. At least, that's their hope.