According to science, oxytocin, aka the love hormone, makes you eat less. (Though I beg to differ since I'm always at my thinnest post breakup, sans love.) In some official clinical trial, men consumed waaayyy less cheese fries when they used an oxytocin nasal pray one hour before a meal.
Elizabeth A. Lawson, an assistant professor of medicine at Harvard Medical School (What, like it's hard?), was all like, "Oh yeah, that hormone seems to reduce not only calorie intake, but also increases calorie burning. It burns carbs, it just burns up all your carbs!"
Unfortunately, anorexic inducing Flonase isn't available in the US yet, so I guess I'll have to go fall in love now (which tbh sounds like the only thing worse than working out).