When the under boob peeks out of the bottom of the bikini top.

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.

when a girl with a large nose sucks your dick and at the same time the tip of her large nose rubs the top of your dick