It's not just penetrating a pumpkin that turns people on, but also the scent. "The smell, according to one clever study that had men blindly smell different scents while measuring their penis growth, marking arousal, found that pumpkin, when combined with another flavour, was the biggest turn-on," she says. Rub some pumpkin spice on your body before getting into bed with your partner, or use a pumpkin-flavoured air freshener in the home.