Because D shells are too big and B shells are too small.
Me: Oh, you'd be there, too
A very worn-out thuper hero. (An excerpt from Brother Time and the Turtle: More Excuses for Jokes: )
BIG-TIME plot hole in my opinion"
Cause the B-shells were too small.
Because she can't fit into D shells
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.