On a sitcom, all you have to do to get someone’s personality to do a 180-degree change is hit them over the head with something heavy. Finally, it looks like there’s a way to do that in real life. If your boyfriend is being a jerk and you want him to be nice, forget things like reasoning and logic. All you need is nasal spray. According to a study in Psychological Science, giving a guy a squirt of nose spray gives them a little boost of oxytocin, also known as the “cuddle chemical.” Oxytocin is a naturally-occurring hormone that “regulates prosocial behavior in both animals and humans.” So, keep some nose spray by your bed next to the lube. Sexy.