(I always learn so much on DU!)

Why does everything in many folks' lives have to be perfectly sterile?
Don't humans have an immune system to combat most forms of bacteria and such?
Doesn't the immune system need a workout to form antibodies against newer "infections?"
I believe it does.
I really don't worry too much about everything being sanitized. I do not carry around hand sanitizer. I work on other people's PCs for a living, and rarely get sick.
In case you didn't know, most keyboards are some of the most "infected" items in an office. People eat over their keyboards, and from time to time, I have had to clean them out. I turn the keyboard upside down, and shake the heck out of it. There are ALWAYS crumbs falling out of them. Once in a while, if I was to be so brave as to eat partially decomposed food, I could get a whole lunch out of someone's keyboard.
My point being, that there is food decomposing underneath those keys. These clean freaks are not so worried about these microbes, but they are afraid of a toilet seat. Maybe they still think that they can get AIDS from a toilet seat or something, I don't know, but I have had it with everything being ultra clean.
That's just me.

I remember well cleaning out keyboards sometimes when I took a service call at a workplace. Gross!!!

And some say never pet a cat, wash hands and use sterilizer if you do touch a cat! Like WTF, I grew up as a kid with cats and dogs climbing all over me all the time. And my cat of many years used to sleep on top of me in bed, on the pillow next to me, under my chin for years. ... and a dog by my side.

I don't like the crinkly sound and feeling. I do always wipe the seat with TP before I sit down to clear it of pee and butt lice. But I don't really expect to absorb toilet seat bacteria through my butt skin.

Wish I could have had that talent when I was teaching.
(Butt lice--hahaha).