I remember when I used to volunteer at the middle school where my youngest went. One day I started to wear a pair of jeans that had a tiny hole in them. Nothing embarrassing was showing. The type of work I did was sometimes messy/dirty so I did not want to wear nice clothes - just clean and presentable. My then 13 year old son was scandalized. Mom - you can't wear those jeans to my school! It's too embarrassing! So said the kid wearing jeans that had both knees out and a patch on the seat (the patch done in plaid flannel to look like underwear).
On another note - kids are so lazy these days, they want to have someone else wear the holes into the jeans so they don't have too!