Hen Party (bit rude)

I was at a bar the other day and I saw a hen party wearing T-shirts printed with the words Penis Police. I asked them what it meant.

They said that if I had an average-sized penis, I would be charged with a misdemeanour. If I had a large penis, I would be charged with a felony.

Anyway, long story short,

Spoiler:

they gave me a parking ticket.