Porcupine in the forest

When a male, or female has an intense itch in their pubes.

Chad: Bro why are putting cornstarch in your pants.
Brad: Cause bro, I got a porcupine in the forest.
Chad: Wow, that is a very interesting, and useful phrase that can be utilized in everyday conversation.

( ͡° ͜ʖ ͡°)
Brad: Yea, some sort of linguistic genius posted it on urban dictionary ( ͡° ͜ʖ ͡°)