I got a long slow loving patdown when I opted out in IAD. Including hands across the penile area etc.
I was not thrilled but at least I was expecting it.
They didn't grab my testicles but almost...I think this is purposeful intimidation to get more people to go through their possibly harmful scanners.
I suppose it was back of hand, it happened several times, and the entire body patdown was much slower and more invasive. Obviously they have been given instructions.