Just thinking about your romantic partner can lower blood pressure! In a just-published study, University of Arizona researchers tested 102 people who were in committed romantic relationships. The participants were given a highly stressful task to complete while their blood pressure and heart rate were monitored. While doing the task, some participants were told to think about their loved one; others were told to think about their day. People who thought about their partner had a much lower blood pressure response to the stress.