There's gotta be more to that sperm donor story. "Oh that must be my biological kid from that sperm bank trip 20 years ago" is not the natural train of thought

There's gotta be more to that sperm donor story. "Oh that must be my biological kid from that sperm bank trip 20 years ago" is not the natural train of thought when you see someone who maybe vaguely looks like you as a suggestion on Facebook. And whatever the other context was - maybe one of them searching for the other - probably gave Facebook what it needed to make the connection.