A group of primary school children go to Ascot races to learn about horses.
When it's time to take the children to the toilet, it’s decided that the girls will go with one teacher and the boys with the other.
The teacher assigned to the boys is waiting outside, when one of the boys comes out to tell her that none of them can reach the urinal. Having no choice, she goes inside and helps the boys with their pants and begins hoisting them up one by one over the urinal.
As she lifts one boy, she can't help but notice that he's unusually well endowed. Trying not to stare, she says "You must be in Year 4?"
"No love", he replies, "I'm riding Silver Shadow in the 2.15".