>>67650
allergies to specific metals can build up over time and eventually your body becomes intolerant to having it touch your skin at all, giving you contact dermatitis that lasts as long as the amount of time you had the irritant touching your skin,
I only had belt buckles and glasses touching my skin but that was enough to trigger it, i'm allergic to nickel and it's in all mystery chinesium and probably 304 stainless steel too, so I try to avoid having bare uncoated metal touch my skin for long periods, this also means I can't do metal chastity cages even tho they're the cutest ones :(