When we moved here about a year ago, we bought beds, duvets and bed linens. (Moving vans are expensive). My sister went to the shop and among other things, got four duvets for the children.
Simple, right? Four duvets, four children. Turns out, it wasn’t that simple at all. Now that the children have one each, there’s an identical one still in the closet.
My sister (and I) remember clearly how she went to the shop and returned with everything in a couple of huge tote bags. It was definitely four of those duvets. She’s been back to get some other stuff from there, but no duvets. We already had the ones we needed.
How is this possible?
Vegan Lynx 
Wow, that is a mystery. 😀