Good taste?

I was looking for some earrings for my sister for Christmas. I went into a boutique store in Melbourne where I lived. The store sold specialty crafts and designs and had a range of unique earrings by local designers that I had never seen elsewhere. A pair of silver earrings caught my eye along with about twenty other designs from a particular designer. I looked at the other earrings by that designer but kept coming back to those earrings. I then walked around the store to look at all the other earrings by other designers but I kept being drawn back to this particular pair. I bought them for my sister thinking I'd love them for myself. Forward to Christmas morning in Adelaide. My sister opens the earrings I've bought for her. She looks at them and I tell her that they're good ones and not to lose them. She hands me a present and impatiently tells me to open it. I open the present to find the exact same earrings with the same design, except she bought them in a boutique store in Adelaide and had never seen them elsewhere. Shared good taste??? While I know families often share the same taste these earrings were not available in mainstream stores. Out of all the earrings out there what's the likelihood that we bought the exact same unique design of earrings - and in different cities?