1. Peeing with a boner.
2. Sitting on your wallet all day and getting a sore butt cheek.
3. When your balls uncomfortably stick to your legs.
4. The dreaded multi-stream.
5. Shaving in general.
6. Rogue boners out of nowhere.
7. When swim trunks show off your junk.
8. Having your penis shrink to a nubbin after being in cold water.
9. The fact that blue balls are real.
10. The fear of somehow getting kicked in the nards.
The threat is around you at all times. The question isn't how it will happen but when?