A tent that is pitched only upon arousal.
When a man/boy gets "excited" something that appears to be "tent-like" begins to form when the male species gets sexually excited.
Also known as a boner within boxers

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.

Not every guy goes to scouts but they can all pitch a tent in the morning

Erection of said tent can be achieved through the employment of your morning stonk on.