If most men don't wash their hands after using the toilet then I doubt this study is disturbing. Oh, but it should be because you won't know if the person you shake hands with washed his hands or not after doing their business. And by the way the number of people who don't wash hands after using the toilet is quite high. 63% of men and 39% of women don't wash their hands after using the toilet. Think twice before shaking hands with anybody next time. Or do it like the Muslims — use your left hand.