By “Ouch”, are you implying you don’t wear mercery, or the last time your tailor was altering your mercery, you were poked unceremoniously in the backside?

Mercery (from French mercerie, the notions trade) initially referred to silk, linen, and fustian textiles imported to England in the 12th century. The term mercery later extended to goods made of these and the sellers of those goods.