There is no scientific evidence to suggest that excessive masturbation makes a person lazy. A lack of motivation, low energy levels, or other underlying medical conditions typically cause laziness. Masturbation is a natural and healthy sexual activity when practiced in moderation and does not directly impact a person's motivation or energy levels. However, excessive masturbation can lead to a sedentary lifestyle, contributing to a lack of motivation and low energy levels if combined with other factors such as poor diet and lack of exercise. It is important to practice moderation and maintain a healthy lifestyle to avoid any potential negative effects of excessive masturbation.