Why?

'Mummy why have you got black toenails?'
Because I just painted them Charlie

'Why did you paint them?'
Because it makes them look pretty

'Why does it make them look pretty?'
Erm because when I wear flip flops my toes look more interesting

'Why do they look more interesting?'
Because I painted them

'Why didn't you paint them red?'
Because I like them black

'Oh. Can I paint my toenails?'
exasperated sigh, if you want to sweetie