Can't you place a password only you can remember? Or did you do that, and did you forget it?

Is PlayStation porn part of your routine sex life or something?

Create a new username? And have that account access anything.

I'm pretty sure you can put in a password that only you know. Or just monitor what your children play and watch.

You can put a sub account for your children

How old are your kids? If they're not teens that's fine, but if they are teens don't be those parents that don't let them play M games

Well, not figuring out the password system before doing a full lockout was just silly of you. But good on you for trying to be proactive with your kids' entertainment. Too many parents bitch about mature video games being made, when the real problem is that they'll buy their kids any damn game without bothering to check the rating.

Why don't you guys get married. or at least call him your Husband

Do neither of you have a TV or a laptop? Besides, if you don't want them playing adult games, don't let them have the discs. As simple as that. If they don't have access to the aforementioned games, then there's no need for parental controls.

Make your first user the parent account and then make a secondary account for your kids with parental controls. You can always go to the PlayStation forums and FAQs to sort this out.