Another holiday, another gift to buy. That may be the attitude some approach Valentine's Day with—especially so soon after Christmas. But there's a science—yes, a science—to gift-giving that can make things much easier for you this lovers' season. According to a study from the University of Florida and Carnegie Mellon University, most people enjoy getting a practical gift. They want something that they'll use all the time but don't necessarily want to purchase for themselves. Perhaps one of the more practical gifts men like to give women is a candle to make a room or home smell better. But wouldn't it be more efficient to buy one thing that makes the home smell better in every room? Scented Vents has a Valentine's Day gift your loved one will never want to return or regift. By connecting a small box to your HVAC unit, you can choose the scent you want to be distributed throughout every room in your house—without lighting a candle.