[WayneS]

Apparently for the same reason young people have dared each other to pour salt in their hands and hold ice until it burns, douse themselves in rubbing alcohol and set themselves on fire, or bite into colorful liquid laundry detergent packets.

...or place their tongues on metal flagpoles when it's well below freezing outside...

[Billthedrill]

...or place their tongues on metal flagpoles when it's well below freezing outside...

Now just a dang minute. That was a Triple Dog Dare. You can't back down from a Triple Dog Dare.