I loooooove this. I can't tell you how many of my friends have made the decision to spawn and then magically disappear, or just cut their single and/or childless friends out of their lives.

I think my favorite ode to this ridiculousness is Garfunkel and Oates' song "Pregnant Women are Smug."

http://www.youtube.com/watch?v=LbTB3ASkdOo