That's deep

Yup.. and all you have to do is wait until time and opportunity collide then boom .... you meet. But if they're lost in a sewer somewhere then... tough luck

But they're dead

They might not be born yet, if you happen to be so inclined...

Assuming you get married, which is a pretty massive if for most of the people on this site.

I'm married already, so I got this covered for me

"When I was a young boy
my father said to me:
'there's only one girl in the world for you
but she probably lives in Tahiti' ..."
Wreckless Eric - "Whole wide World"