Because there'd be a boy...

This is how a conversation unfolded with my oldest:


L: "Daddy, I am 16 going on 17."
Me: "No you're not" (she's 8)
L: "I know but I wish I was."
Me: "I don't"
L: "Why not?"
Me: "Because that would mean there would be a boy 18 going on 19."