A personal temperature gauge. Every male has one.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

A device that is attachable to vaginas, and measure the amount of dick that the vagina gets. The measurement is in d/m (Dicks per minute). It is a very useful device and can be used for many purposes such as:
a. It helps keep track of how big a slut you truly are
b. Gurls can have dick offs/competition where there will be an objective judge
c. Proving your fat friend Janet, who claims she gets loads of D, is a fucking virgin