Because B-shells are too small, and D-shells are too big.
In case he got a hole-in-one!
To hide his booty.
Cause the B-shells were too small.
Seashells
Because a and b shells are too small.
Because she grew out of her B shells.
Because B-shells are too small and D-shells are too big!
Because she can't fit into D shells
Because D shells are too big and B shells are too small.