It ages you and causes inflammation that results in wrinkles, decreased quality of orgasms, type 2 diabetes, heart attacks, strokes, memory loss, breast cancer, and prostate cancer, and altered body image, to mention only a few effects. Obesity occurs when your waist is more than one-half your height, or your BMI is greater than 30. A high percentage of illnesses presented in doctors’ offices and hospitals have their origins in obesity.