OMG! I don't have the answer for you, but I can definitly relate, my 3 year old son, all of a sudden decides to no longer wear pull-ups at night, underwear ( we have 3 different kinds, which he refuses all of them), pants , and socks, the only article of clothing he will wear is a tshirt, or long sleeve tshirt but if they have an elastic cuff, FORGET IT. This is day 4, and Im frantically searching the net for a quick solution, this is a child that listens and responds well to reason, and no amount of reasoning with him works, I live in Quebec Canada and right now it is minus 30 degrees outside, so he needs to wear clothing.... yesterday he decided every pair of pants he owns are too tight ( which they are not), he doesnt like the button waist, and believe it or not, he didnt want to wear a pair of jeans because they have a loop label on the exterior of the pant, it took me 45 mins to convince him to get dressed yesterday because I was going to the grocery store, and he absoultly wanted to come with me..... 7 pairs of pants later, I was at a loss....he finally settled on a old pair ( which are a little to short for him (( thank god for winter boots))..... so please hang in there, And this is what I told myself yesterday as steam was shooting out of my ears. Calm down and try to understand his needs, not my own..... So be patient with your little sweetheart's issues of not wearing panties, our kids are just too young to be able to express correctly what is bothering them....you and I and all the other mommies, good luck and if anything gives, please let us know!!! Thanks