I do think that as adults,we may lose some of that hyper sensitivity(still more than an NT but not as bad as when younger).I think this might be the same "dulling of senses",that comes with aging in general...our eyesight,hearing,memory,taste buds,naturally deteriorate from exposure oand aging.(smoking cured some of my taste and smell issues,though I obviously dont recommend it as a treatment,lol)
I stopped ripping ALL the tags out of my clothing in my late 20's,only the worst ones bother me now.For vanities sake,I have worn synthetic materials but some have me itching in a matter of minutes or hours,maybe depending on if I am having a more overloaded day in general?Before causing to much discomfort in trying to dissenseitize a child,I would ask if there are other ways of dealing with them....avoidance,ear plugs,wearing only cotton?The things that are more difficult to avoid are the ones to focus on and I think we just learn to "cope" with the others the best we can,outgrowing some.
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Just because one plane is flying out of formation, doesn't mean the formation is on course....R.D.Lang
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