Brain freeze
Stepping on an upturned three pin plug while barefoot.
Getting kicked in the perineum is more painful that the genitals.
I did that only the other night. It was the plug of the fan that I had been scrabbling for, so that was something.
My boarding school had shower blocks and intermittently, someone would scatter drawing pins in. Not amusing when a number of us would step on them, especially tricky when vision was compromised with shampoo.
Kneeling on a lego brick
Tweezering a single nasal hair
Earache.
That's a good one.
Nipple burn after an extended period of running.
Getting kicked in the perineum is more painful that the genitals.
In the winter - I get a little nick in the skin on my thumb, just above the top corner of my thumbnail. Pound for pound that has to be the most painful thing to get -when you keep knocking it.