The need to protect a child from suffering is hardwired.
You would gladly take their place because their pain is your pain anyway.
Eleven of the 12 men to walk on the Moon were former Scouts.
Would they have got there if they'd had all that youthful testosterone channelled into tedious personal and sexual health seminars?
So I can hardly begin to imagine what private agonies Mark and Julie James went through when their son, Dan, asked them to help him die.