- The participant will be asked to self-administer either the oxytocin or a placebo, into their nose by using a nasal spray bottle. Oxytocin is a hormone that naturally occurs in the body and has been shown to be relevant for many behaviors, especially in social situations. The participant will be assigned by chance, much like the flip of a coin, to receive either the oxytocin or the placebo during the first study visit. The participant will then receive the other during the second study visit respectively.