19548, and are you exactly the normal orientation?
How do you know that all people who do not wash their hands after the toilet regularly wash their penis? Rather, on the contrary, they do not wash it, since they do not have a habit of personal hygiene. Accordingly, there are bacteria, and the remains of his and female discharges, if he had sex the previous evening (and if with a prostitute, then anything can be).

There are also a lot of bacteria on the washed member. So you can equate going to the toilet to working with toxic materials.

And handshaking most people do not bring a good mood as you write. Parts of the people are simply popy, part are perceived as "unpleasant, but type tradition". That is all.