Well, Richard, that's exactly the point. He thought he was in a situation where he could say what he really thought, and not get caught. People of integrity act the same regardless of who is watching and listening.
Sure, I've said things in private that I regret. I'd guess most people have, especially in their younger days. But Trump was a middle-aged man when he made those remarks. And he hasn't apologized; his repeated insistence that it was "locker-room talk" just sounds to me like he thinks it's okay to spout vulgarities and disrespect women, as long as it's in private. 
Do you agree with him?