...and because most of us need the eggs.

"Well, it seems to me that the best relationships — the ones
that last — are frequently the ones that are rooted in friendship.
You know, one day you look at the person and you see something
more than you did the night before. Like a switch has been flicked
somewhere. And the person who was just a friend is...suddenly the
only person you can ever imagine yourself with."

- The X-Files, 6x08