Maybe cross pollination? Many people have geraniums in the area and the bees likely carry the pollen everywhere

I also heard as a child that if a red geranium petal falls on the soil of a white geranium it can tint their flowers. But that sounds like a urban legend to me!

I discovered MBR a couple years ago and my first impression was, “is this… electronic metal?”. And turns out it is. Love them.