Anyone who's grabbed a bucket of popcorn at the movies knows the drill—half's drenched in butter, the rest's bone dry. You shake, you stir, you try again, but the mix never works out. Turns out, there ...

Digging your hand into a freshly popped bucket of movie-theater popcorn is a euphoric experience that intensifies the more your fingers are covered in salty, buttery goodness. However, you'll ...