Seems to be common wisdom to wash new clothes:
"You should absolutely wash clothes before you wear them, especially anything that is right next to the skin or that you will sweat on," says Hogue. Even if potential germs from fellow tryers-on don't faze you, the chemicals on the clothes themselves should certainly give you pause.
According to Hogue, almost every yarn or dyed fabric requires chemicals to make them into cute skirts or tops. Unfortunately, those chemicals can have side effects, like contact dermatitis, an itchy red rash that pops up anywhere the irritant came in contact near the skin. "Most of the chemicals used in dyeing fabric and putting those finishes on yarns that allow them to be processed through spinning equipment are known skin irritants," Hogue says.
I didn't know this and survived 32 years with only minor hair loss (Maybe if I had washed my clothes before use ...
To me it sounds like "appeal to fear", so I was wondering what are counterarguments to the mainstream opinion.