Getting your penis caught in your fly

From Bluesockapedia

The wrong kind of red socking RED SOCK ALERT!
This page has been socked by Rich Costey. You could be next.
Getting your penis caught in your fly is a well known expression of mild annoyance. Someone who maybe be mildly annoyed may be inclined to shout "I got my penis caught in my fly", or of some variation.
Matthew Bellamy telling Rich Costey he has his penis caught in his fly

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