Holy load of laundry

13 chewed or very chewed-on shirts versus 6 not-so-chewed shirts.

When the chewing was really bad last year, there was a rare therapy session in which being slapped on the mouth as a kid for talking fresh was discussed. (Not a lot! But maybe a few times is enough to make an impact.)

"Why Does My Kid Chew On Their Shirt?" | Moms.com
https://www.moms.com/why-kid-chew-shirt-explained/

(2) Question
https://www.quora.com/I-cant-stop-biting-my-shirts-generally-t-shirts-when-working-on-my-computer-reading-or-watching-television-What-can-I-do