Refusing to wear clothes

I don't know that I can help, and maybe you've tried everything... Does he use a blanket when he's cold? 

Cloting is a funny thing - ! buy 100% cotton or 100% wool. If there's a percent of polyester my physiology responds different - it doesn't feel nice. In polys I sweat. Even better than marino wool or fine threaded cotton can be silk. But cotton is the most breathable. Some have issues can be where T shirts stop and how pants begin - which can be fixed with all-in-one jumpsuits/PJs in cotton. Or just long PJs like Living Crafts will make. Or even overalls.

It sounds a bit like he's had nightmares about clothing, though. As if he watched an animation and the clothing came to life and it devastated him. If he can initiate wearing a coat or wearing a few items in increments it could help. But this sounds really difficult. 

You could see if fabric is an issue by buying samples of cotton, wool, polyester, jean, silk, etc. and making cut-out clothes for paper dolls (cut out various forms of dress for each maybe? a kilt, an all-in-one, a long male-robe, pants). Or just watch videos of children learning to dress themselves. Even buying dolls for him to dress? Allowing him to dress himself and / or helping him envision getting dressed might be incredibly helpful. When I imagine a thing it's nearly impossible for me not to do it to completion. 

So sorry! This sounds really difficult. 

I don't know that I can help, and maybe you've tried everything... Does he use a blanket when he's cold? 

Cloting is a funny thing - ! buy 100% cotton or 100% wool. If there's a percent of polyester my physiology responds different - it doesn't feel nice. In polys I sweat. Even better than marino wool or fine threaded cotton can be silk. But cotton is the most breathable. Some have issues can be where T shirts stop and how pants begin - which can be fixed with all-in-one jumpsuits/PJs in cotton. Or just long PJs like Living Crafts will make. Or even overalls.

It sounds a bit like he's had nightmares about clothing, though. As if he watched an animation and the clothing came to life and it devastated him. If he can initiate wearing a coat or wearing a few items in increments it could help. But this sounds really difficult. 

You could see if fabric is an issue by buying samples of cotton, wool, polyester, jean, silk, etc. and making cut-out clothes for paper dolls (cut out various forms of dress for each maybe? a kilt, an all-in-one, a long male-robe, pants). Or just watch videos of children learning to dress themselves. Even buying dolls for him to dress? Allowing him to dress himself and / or helping him envision getting dressed might be incredibly helpful. When I imagine a thing it's nearly impossible for me not to do it to completion. 

So sorry! This sounds really difficult.