It's just that he is only a little boy. He is the youngest in the year and is completely un-streetwise. His friends' mothers are unhappy about these lessons too.
I'm not Victoria Gillick (remember her, anyone?) and I would be happy for information to be provided at the end of Year 6 before they move up to secondary school, but I strongly feel that at nine years old this is going to be all too much.
I know that there is the brigade who insist that children must be aware of everything from the earliest age, but I am happy for children to stay children for as long as possible.