Why does Ariel wear seashells? Because she can't fit into D shells

Stunt pilot? My friend Andrew met a girl in the pub last night, and they ended up going home together. Tonight the girl walks into a supermarket and on her way round she sees Andrew...He was stacking washing powder boxes onto the shelves. "Andrew you lying bastard" she yells "last night you told me you were a stunt pilot!" "No" he says "I told you I was a member of the Ariel display team."

Q: Why did Ariel wear seashells? A: Because she grew out of her B shells.

Why do mermaids wear bras? To cover up their Ariel-as.