Many people also like to put painfully spicy condiments on their food, rather than endure the boredom of a bowl of plain white rice. Then there's this...
I remember at Disneyland in the 1960s there was an old-time penny arcade on Main Street that had a "test your strength" or "test your manhood" machine where you grabbed onto two polished metal knobs and let an electric current pass through your body to see how long you could stand it.
It seems like it had a mechanical animation of a mounted knight charging a dragon, and if you held on long enough the knight would skewer the dragon with his lance. (Though I may be confusing the Disneyland one with another one I saw somewhere else. I loved old-time electro-mechanical penny arcade machines as a kid.)
We paid to do it, it was painful, and my buddies and I all loved it - though I think that it may have killed my friend's new Timex that he'd just gotten for his birthday.
Edited to add:
I may have found a (bad) photo of the zapper machine. I think it's the one to the left of the kid in blue in this photo:
From this page:
I'm just taking a walk down memory lane, don't mind me.