Don't have to worry about a purse or whatever you call it. I wear jeans and use a man's wallet. Did it when I worked, too. Hunted for pants with plenty of pockets or else wore mens. I stick my reusable shopping bags on the cart seat. I like having hands free. Cell phone in a clip on pants pocket. When I did carry a bag, it was full of electronics and nothing else.
My mother said you have to eat a peck of dirt before you die. I must have eaten bushels. She also told me how she and her friends would grab tar from the tar machines and chew it. This was before chewing gum. She also said if you don't worry about it, you won't get it. She was mostly right. She babysat kids with almost every childhood ailment and never brought it home. I got measles and mumps from school.
One of the dirtiest things around is a computer keyboard.