me and my bro who is two years younger than me from like the ages of 6-14 had 4 pairs total of underwear in rotation and we used to have to share them or we didnt wear underwear. of course they were clean but it became a bytch when you wanted to go out and play on a hott summer day and you only had 1 pair each for the next day and didnt know when you would see clean undies agian that week.