Funny man Jack Black has banned his children from listening to his Tenacious D records until they are at least 13. The comedy rock group are currently filming a movie littered with plenty of their trademark profanities, and although Black has no problem condoning the watching of rated 18 films, he is not so happy for his first child SAMUEL JASON or any future kids to hear his unsavoury musical offerings. The School Of Rock star says, "They'll get to see it ... but I'm not going to let my kid hear any Tenacious D. Well, actually, we've got a couple of songs that are OK for kids but probably once they're 13, they can hear some bad words."