They do, though. They make the body scan and if you jeans with a suspicious 'steel' trouser button, or if they're made of thicker material than is most popular (so basically Levi's 501), you get the patdown, first your waist and then your inner thighs all the way up to your balls.

Literally 1/2 times I've flown I've had my balls touched. I wish I was kidding.