Tommy Lee is preparing to teach his young sons the facts of life in the near future - because the rocker himself was sexually active at the age of 13.

The Motley Crue drummer and his ex-wife Pamela Anderson are the proud parents of BRANDON, nine, and DYLAN, seven.

And Greek-born Lee admits that while he's not planning to talk to his growing boys about sex immediately, he knows - judging by his own past - that he'll have to consider it soon.

He says, "I don't have to worry about (telling my sons about sex) right away, 'cause I ask both of 'em like, 'Guys, any girl that's cute to you at school? Do you have a girlfriend?' They're like, 'Dad! No way! Chicks are gross!' I was like, 'In a few years you're not gonna be saying that at all!'

"I mean, the first time I had sex I was 13. That's four years from now for my son! And I think people are having sex sooner than when I was. Time is running out, man!"