Obesity and sedentary lifestyles accounted for approximately 400,000 deaths in 2000 compared to 435,000 from cigarette smoking, 100,000 from alcohol abuse, and 20,000 from illegal drug use.

Soon enough, someone will invent an "exercise patch."

Obesity and overweight rates remained steady from approximately 1960 until about 1980. Since then they have spiraled almost out of control.

What caused this ...?

The principal driver seems to have been the increases in rates of labor force participation by women.

What would Freud say? It's not about sex, but it is about your mother, your sister, and your daughter.