you are absolutely right. Talking about small exposure only is a typical marketing trick. The type/frequency of the radiation and absorbing site would make all the difference. They just abuse the general ignorance of the population. When i'm to fly, i'm all for groping. Just need to get a Prince Albert done.
http://www.deadseriousnews.com/?p=573
http://thewashingtonfancy.com/2011/09/18/man-takes-viagra-we...
"A TSA spokesperson declined to comment on this specific case, but said that anyone ejaculating during a pat-down would be subject to arrest."