Asparagus, with its phallic shape, meets Hopkins’ visual criteria for an aphrodisiac. But once digested, asparagus works from the inside out by stimulating the urinary tract says Chris Kilham, author of Hot Plants: Nature's Proven Sex Boosters for Men and Women. “It gives you a little itch down there,” Kilham says. “It can be quite pleasantly stimulating.” In fact, the jolt may be compared to that delivered by the famed Spanish Fly, the beetle that is both a strong aphrodisiac and powerful toxin. So if you want some of Spanish beetle’s potency, without the danger, give asparagus a try.