“A young lady in France had the fatal habit of cleaning her ears with pins; a trifling humour was the result, which terminated lately in a cancer. The brass and quicksilver used in the preparation of pins may easily account for this circumstance, and which render them so very pernicious to the teeth when used as tooth-picks.”
— La Belle Assemblee, Vols 17-18, Jan-Dec 1818
I shan’t say anything further on the matter. You’ve been warned.