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This has been puzzling me for a long time and I was wondering if anyone had any ideas about why it happens.I have braces on my teeth (they are fairly ordinary as far as I now and made of metal although I'm not sure which). One day I was fiddling with a paperclip and I put the end of it my mouth. I suddenly got a huge surprise and took it out - I could taste the paperclip very strongly. Puzzled I experimented further. I discovered that if I touched the end of the paperclip onto my tongue, I couldn't taste anything unusual about the paperclip - it tasted pretty much of nothing. If however I touched the paperclip onto my braces and my tongue at the same time I got such a strong metallic taste it almost made my eyes water! It was such a weird experience that I have been confused about for ages. I have since noticed that the same thing happens with the small silver balls people sometimes use as cake decorations.Does anyone know why this happens???