Eskimos rub fast when they fap,
Mindful of this common mishap:
If their hands don’t stay warm,
Icicles promptly form
And their boners break off with a snap.
See also this limerick’s Erections companion pieces:
Frostbite occurs when ice crystals form on and in the skin as the outside air temperature reaches -2.2°C (28°F) or below. First affected are body parts farthest from the heart, where constricted bloodflow represents the body’s attempt to protect internal organs at the expense of ultimately expendable extremities. Eskimo is an obsolete—and, to some, offensive—term that referred to, depending on context, either the people or the language primarily of the Inuit and Yupik, indigenous inhabitants of Canada, Alaska, Greenland and eastern Siberia.