Million Dollar Idea number 006
Suppose you're a spy, and when you have to go on the run you cut your long hair and possibly your beard to make people less likely to recognize you and to make descriptions of you inaccurate. If you're captured, though, the enemy might look closely at your scalp and see that it's not so tan as the rest of your face. Then they'll know you recently went from long to short hair. You can avoid this embarrassing situation with my new invention: the under-hair scalp tanner. It's a set of comb-shaped devices that slide under your hair, sit next to your scalp, and deliver ultraviolet light of just the right intensity to make your scalp match your face.
