When you donât 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 havenât shower showered in days, my penis stinks so bad I could use it as a Penis Flytrap!