Having sex three times a week can make you look ten years younger according to Scottish researcher David Weeks. This clinical neuropsychologist from the Royal Edinburgh Hospital conducted a ten-year study where he and his team interviewed over 3,500 people ranging in age from 20 to 104 years old. While this is quite an age range, the study attempted to focus on participants 45 to 55 who looked young for their age.

A judging panel of six people worked with the subjects to guess their age and on average they were 12 years older then the panel had guessed. During the interviews the participants were asked a number of questions about their lives in general and their sexual activities and two factors kept creeping up as the common denominator amongst these younger looking people. Vigorous physical activity such as exercising and workouts were the number one item on the list. The second was a healthy sex life where the participant and their spouse have sexual intercourse at least three times a week.

The act of sex can burn fat as well as release endorphins, a natural chemical that helps battle stress and anxiety. In males, sexual intercourse stimulates growth hormones and testosterone. In both men and women having sex can even increase the immune system based on the chemical reactions it releases into the body.