[Aries]

I came up with the perfect costume idea but unfortunately don't have the cash to put it together. So use it if you want. You will need:

A white lab coat
Three blow-up sex dolls in the all-fours position (they must exist, right?)
Duct tape
Collar/leash

Put on the lab coat, inflate the dolls and tape them together ass-to-mouth. Apply collar and leash, and voila! You are a mad doctor with your very own human centipede!