How come when jerking past its sell-by date the head of the penis starts to hurt?

Ok so i shake bad but what guy dosen't? All i want to know is when jerk sour after awhile of doing it the pave the way of the penis starts to hurt. Why is that?

Puberty...?


Answers:    If you're circumsized and it hurts when jacking stale it medium you might necessitate to use some lube or babe grease when jacking past its sell-by date.
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