Gynecomastia, characterized by the enlargement of male breast tissue, often referred to as 'man boobs', can impact many men in various stages of their life. It's a relatively normal occurrence in young men and teenage boys due to hormonal imbalances during adolescence, but it can also develop in adults due to several factors such as obesity, hormonal changes, the usage of certain prescription drugs or illicit drugs, kidney or liver disease, and certain endocrine disorders.