Being married and deliberately avoiding having children is like chewing your food and spitting it out without digesting it. An empty exercise that completely misses the point.
Compare and contrast to this article about Japanese Men and Women
http://www.usatoday.com/usatonline/20040603/6255200s.htm
So there is a dark side to the "zero population growth" movement. When succesful it actually has a very large and negative societal impact.
I remember reading a similar article several weeks ago about the same kind of problems in Greece. Basically, the Greek Women have had it with the Macho Greek men who won't help at all with the kids or house work. So as a result Greece now has one of the lowest birth rates in Europe these days.
I recently spoke with a distant aunt who had no children. Husband gone and all the friends they spent their lives with are now dead. She never paid much attention to the upcoming generations, seemed to consider them a bother. Now she is looking back on her life and realizing that friends are not the be all end all.
I dunno. If someone is so self-centered that they put their own needs ahead of everyone else's, then perhaps it's best that they don't have children. Just imagine the hell of growing up knowing you're the least important thing in your parents' lives.