In the eighties, scientists issued a strange warning: don’t drink grapefruit juice if you’re taking the high-blood-pressure drug felodipine. The study, led by University of Western Ontario’s David Bailey, found that the body’s levels of felodipine mushroomed after people drank the bittersweet nectar. They later identified 50 more medications that exhibited the “grapefruit juice effect,” stamped warning labels on them, and called it a day.

Those who believe that the 25-cent peep show is restricted solely to humans, guess again. A January study at Duke University Medical Center revealed that male rhesus macaque monkeys will “pay” to gaze at images of female monkey posteriors. The animals gave up quantities of fruit juice for prolonged views of either female hindquarters or the faces of high-ranking males in their society.