A 66-year-old man presented to a dermatologist with a pruritic, erythematous, scaly, and mildly hyperpigmented rash of 2 weeks' duration that involved the scrotum and both inguinal creases (Panel A).

Monkeys are two legged creatures like humans. They are sometimes seen scratching their armpits. I recently read that this armpit scratching is a sign of happiness for monkeys. For humans, scratching ...