You don't necesarilly need to do anything physical to be abusive in a sexual manner.

The guy is so far detached form reality that he doesn't have a normal comprehension of what right or wrong is hence why he'll openly admit sleepign in a bed with kids and thinking 6 billion people are wierd for saying it's wrong.

By this same token I think he is easilly capable of doing more stuff but he genuinely doesn't think he's doign anything bad.