

Education… educated people think about things. Above all, when is the best time to have a child in terms of financial situation etc. Political and world events etc. can also be taken into consideration. .
Meanwhile, the uneducated have the 4-5 child.
The educated now have the problem of age and have waited too long/thought about the fact that having a child is no longer an option.
The ending is all the funnier for it. Well and teaches you what not to do.