Sex has a lot more to do with health than you give it credit for.
It lowers stress levels. Lower stress is related to longer lifespans.
It is exercise, as you mentioned.
It is fun, which promotes mental health.
In a good relationship it promotes emotional health.
And the morning after has a significantly higher risk of heart attacks for men.
It's significant.
I would agree with accord98lx.....I would suspect laziness as the main reason. It was a commercial, they're trying to sell you something. A sales pitch like "most people think they do it wrong, we'll show you how to do it right" just may motivate that lazy and gullible person to get off the couch and do a little exercise. A commercial like "most people are lazy because they're watching our commercial and not buying our products, give us money to stop watching the tv!" won't motivate anybody. They're basically saying you're like everyone else and you just didn't know it, because of course they just made it all up....and telling you your problem is easy to fix, just let them show you.
Or maybe I'm a little too cynical?
b