Mike - I think it boils down to one main issue, moms will find it necessary to do things that will entirely baffle a dads mind. A father will be serioualy affected when he comes home to find mom with a big proud smile on her face because junior is dresses as a duck, a bunny, or a pumpkin. A mom will be beside herself when a dad first tells the boy to pull his finger. Retribution is yours, it just takes a little while before you can apply it.
Fortunately your son will not recall the duck or bunny outfit but he will always know what's next when he pulls your finger

- which for you could be a scary thing
