13 year olds having sex

Is it just me or does anyone else feel sick to the stomach reading some of the dirty stuff 12-13 year olds are saying they do with boys? I'm genuinely shocked by what they're getting up to at their age, I'd be distraught if I had a daughter that age and found out she'd done half the stuff other kids are saying they've tried! In fact I don't even think I'd be able to associate myself with her ever again.