This chemical has been coined the “cuddle drug.” Oxytocin is a hormone naturally made in the body in both men and women. Traditionally, oxytocin has been used to induce labour, but recent studies show it is highly arousing to men. Now, oxytocin has been formulated into a nasal spray to be used as an extra dose to improve a man’s libido. Its results for sexual arousal in men is on a par with Viagara, only it has the added bonus of strengthening your relationship on an emotional level. What else do you need? Better intimacy and understanding all in one.