Dear David;-
    Now I'm not saying this to be funny. This is the other ME.
    In given circumstances, there is an advantage to being sinistral.
I'm thinking of baseball. The advantage occurs because of its
uniqueness. There are a higher percentage of left handed baseball
players than in any other sport or human endeavor. I only offer this
to indicate that we may have to widen our search to find advantage or
dis-advantage among mollusks. Does anyone know if great apes and
monkeys favor left or right hands?
       Art