When you insert your penis into a woman's anal Cavity and then the women clenches her anal sphincter thus rendering the males penis stuck and begins to tug agressivly. Causing a male orgasm.

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.