Communication. My kids talk to me. Share secrets. We trust each other. They know we're in this journey together. I know which ones of their friends are having sex. We actually have very explicit discussions about sex. Make sure you do the same with your kids. It's a dangerous world out there for them.
Whatever you do, ...maintain that trust, ...and DON'T EVER LIE TO THEM!
I can't tell you how traumatic it was for me to know my Dad actually flat out LIED to me, when at the age of 8, I asked him what a penis was, ...and he told me he didn't know.
Ok, so it wasn't until I was 10 that I actually found out what one was, that he not only knew, ...but that he had one, ...but even though it was 2 yrs later, ...it still upset me that he knew and lied about it. I had a hard time trusting him after that.