Presumably the usual doli incapax rules would apply in the UK ie a conclusive presumption of innocence if the perp is under 10 (or is it 10 or under?) and a rebuttable presumption of innocence to the age of 14.

As far as I recollect when I was 12 or 14 we were all groping furiously or wishing that we were, and a sizeable and much envied minority were having sex - most of that minority (ie the active under 14s) being female.

It is usually useless to try to change human nature by prohibition or legislation.

I get quite vexed by those who want to prevent sex without some magic mantra.

I am convinced that the biggest cause of mental health problms in later life is the lack of a happy sex life. That is what we should be educating or preparing children to achieve, once they are capable of it.