Right, and I agree and I don’t. I’d o my best to explain to my kids they should never put anything in their mouth that isn’t made to be eaten.
But this should be considered when we make blanket claims about it’s okay because we’re just touching them, not eating them. We have to think about how people actually behave, not ideal usage.
By the way, headphones are required in elementary school here and are used at least an hour a day.