Alasdair: Mummy, what's this?
Me: It's my running bra.
Alasdair: Can I get one for when I go treadmilling [running on the dreadmill]?
Me: No, boys don't need them. Boys don't have breasts.
Alasdair: Oh. When I get older, I'm going to put breasts on my Christmas list.
Me: I'm sure you will