What is it with grandmothers trying to set their granddaughters up?

I’ve seen old women showing like teenage girls bagging groceries photos of her granddaughter trying to set them up together. It’s not the only time I’ve seen it either I’ve seen it many times where older women are trying to set their granddaughter up with random dudes.

What is it with grandmothers trying to set their granddaughters up?
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