To cover up their Ariel-as.
Sir!
If they were called womanholes, guys would keep trying to get in.
Russell.
Cuz they're from Douche-anbe!
Because a and b shells are too small.
Cause she was too big for B- shells! (my 6 year old niece likes to tell this joke)
because she was fish tailing!
Because she can't fit into D shells