[DanieI]

I think that it's more likely that the companies that manufacturer wiper blades run targeted ads in places where it's raining and that your son looked up the sheet music for the Seinfeld theme on his phone and Facebook thought you would like it because you are Facebook friends or because your GPS coordinates were next to each other.

[cyberferret]

Fair call - this reasoning I can relate to. I was the first spot of rain in a long dry season spell, so it stands to reason that drivers in the area were highly likely to have dried out, unserviceable wiper blades just when they needed it.

The link about friends search history and close GPS co-ordinates also makes sense.