Try this: scrub your hands for as long as you can tolerate with very warm soapy water, using any type of soap you wish, it doesn't have to be anti-bacterial. Even if you get under your fingernails and all the crevices in your hands, you will still have plenty of microbes(most commonly including S.aureus) left that were missed. This is the most common bacteria that is responsible for acne as well.
Wipe your brow, or touch your eyebrows? You'll pick up a few thousand living and dead microscopic skin mites that live in your eyebrows eating the sebum that your hair follicles secrete. Of course you will carry with that all their excriment, yes, their feces...
But you made it this far in life, and haven't lost the battle. It might make for interesting reading, but for the most part, the many microbe species that live and thrive on the human body just aren't pathogenic, due to our effective immune system.
When it comes to food, the risk of food borne contamination comes from the fact that warm moist neutral pH food, is full of the building blocks for pathogens to grow and multiply, where they can do their damage in numbers. Of course our delicious bowl full of pulled pork, or a dish of macaroni salad, that has sat out on a picnic table all afternoon at temps ranging between 50-85 degrees, don't have a way to fight of the reproduction of these pathogens, or their toxins, that cannot be " cooked out" once they form.
Take home point when it comes to meat: cook clean, chill quick, store properly and serve only when its going to be eaten before it can cool down past 140 or so, and you wont have to worry.