I voted childbirth as I have heard this is one of the most painful things to go through.
As for the "manly" ones, yup getting kicked in the privates hurts. That's nothing when compared to kidney stones. I had them twice and hope none of you ever have to go through this ordeal. The doc gave me Vicadin for the pain, but it didn't do diddly squat. Hands down, kidney stones are the worst pain I've ever had.
- Zombie