Mine are 10 and they are driving me potty. I don't know whether it's hormones or what but they are fighting constantly, they can't be left in a room together for 5 mins before world war 3 breaks out and when they decide that some insanely annoying behaviour is funny, nothing I do or say seems to make a difference. It's like the force of them together adds up to more than I can stop. Let me be clear - these are "good boys", bright boys, nice family 'n all that. And I am a strong confident woman. I just feel sometimes as though I am a puff on the breeze for all the notice they take of me and it makes me feel ill.