i always wear 2 or 3 pairs of socks every day, my doctor told me it is better for me. because my feet sweaty a lot. when my feet start smelly, the fies in my apartment, starting flying around my feet. it is that bad, because they to dated by feet.
everybody change your socks as much you can, now, i gave you a reason.
normally, i tried to buy 20 pairs of socks every 2 years. a good pairs of socks should a long time. i always throw a sock out when i have a hole in them, sometimes i will keep the good sock of the pair, and wait for a sock has get a hole. i throw that one out, then i know i throw a pair of hole socks. wasn't that boring explanation something you didn't know!