Understanding how right-brain and left-brain differences influence our habits, thoughts, and actions. Human behavior is lopsided. When cradling a newborn child, most of us cradle the infant to the left. When posing for a portrait, we tend to put our left cheek forward. When kissing a lover, we tend to tilt our head to the right. Why is our behavior so lopsided and what does this teach us about our brains? How have humans always used this information to make our images more attractive and impactful? Can knowing how left-brain right-brain differences shape our opinions, tendencies, and attitudes help us make better choices in art, architecture, advertising, or even athletics? Side Effects delves into how lateral biases in our brains influence our everyday behavior, and how being aware of these biases can be to our advantage.