When you don’t have access to showering/bathing for several days and the stench from your penis is enough to attract flys. With the foreskin pulled back, you can then attract a fly victim, once it lands on the stinky penis head, you can then retract the penis foreskin and in the process, effectively trapping a fly!
I haven’t shower showered in days, my penisstinks so bad I could use it as a Penis Flytrap!
The event in which a man is done peeing into a urinal, then zips the tip of his penis up in his zipper, causing an excrutiating pinching pain that results in loud sreaming and cursing.
The name derives from the penis getting trapped in the fly. Hence the name penis fly trap.
(two guys standing by seperate urinals, finishing up)
When a girls between your legs giving head and you're about to cum, forcefully squeeze your legs together trapping her head between your thighs and forcing her to take your jizz.
lars: "damn, that girl gave you a dirty look"
mitch: "yeah, i gave her the penis fly trap."
A nearly impossible sexual act, requires extreme control over prostate muscles and or involves the next stage in human evolution, when a girl is preforming oral sex on a man, the man has the tip of his penis open up like the claws on Dr. Octopus's arms, and clasp her head inside
If a girl sucks you off the wrong way, Penis Fly Trap her head to teach her a lesson