[Someone]

And why would those only be a concern if you are eating at your desk, not whe you are working on it and (gasp!) touching you phone, tablet, mouse, keyboard, etc?

Whenever I read an unqualified claim "there are more bacteria on your keyboard than on a toilet seat", I think "hm, most people must be spending way more time than necessary cleaning their toilets". But of course, the scientist in me also thinks the kinds of bacteria present will make an impact. The bacteria on a toilet seat might be similar to the zillions of bacteria in my stomach, or they might be E. Coli, salmonella, tetanus, syphilis, etc.