Because D-shells are too big and B-shells are too small.
Because there's no point in it.
This was incredibly clever when I first thought of it but then I did some research...the closest they get to being Italian is that George Clooney was a "pioneer" for them: Reading that makes me never want to wear them again.
They're not infallible
One has a d where the other doesn't.
Squirrels they're the best at getting nuts out of their shells.
Play hide and shell.
Because "B" shells would be too small!
Sea-sections
Cause she was too big for B- shells! (my 6 year old niece likes to tell this joke)
Because D shells are too big and B shells are too small.