I'll add an anecdote to the baby discussion.
While I obviously am glad that I don't have to be the one to bear the pain of bringing a baby in to this world, I do admit to a sort of strange jealousy; women know this pain, and I cannot and never will. In some ways, an exclusive club that shares stories of intense pain is more deeply connected than a club which just has fun together. I feel perversely excluded.
However, my Aunt has had 5 children, and 4 kidney stones. Kidney stones run in my family. She has informed me that the kidney stones actually hurt her more than did the birthing of her children.
I am thus strangely hopeful that I might ultimately have inherited the genetics necessary for kidney stones, just so I can have some reasonable facsimile to the pain of birthing. This desire is both absurd and sophistic simultaneously, but none of us apply rigorous logic at all times.
I never really thought of it as something that can connect women together. But at the same time I can understand a bit. After all, I've always been curious as to just what it feels like to get kicked in the balls. I can never ever know, and so I want to know. On the other hand, it is possible for me to give birth, and so I actually am not curious about the pain at all.