Me: Why are you naked?
Her: Because I need to go to the potty.
Me: Why, then, are you just standing on the stairs?
Her: Because the toilet makes my bum cold…
(turns around to display cold bum)
… and there’s a sunbeam here…
(bends over and waggles bare bum in the stream of sunlight pouring through the landing window)
… and it warms it up.
(pats her toasted bottom proudly, and then proceeds up the stairs to the bathroom.)
You just can’t fault that logic.