I've finally come up with the perfect analogy for having children.
No kids. This is the wild stallion. Running free on the plains. Not a care in the world. Bound by nothing.
One kid. The once free stallion has been captured. He has been left out to pasture though. Free to roam, but with in certain boundaries.
Two kids. The stallion has been moved into a stall. He is still left alone, and let out to roam every so often, but his freedom has become so limited.
Three kids. The stallion is now in the stall all the time. He is only out when being led by a person. The term 'free' has left his vocabulary completely. One could almost say, he has been broken.
Four kids. The stallion now gets outfitted with a saddle. He cannot go anywhere without being chained by someone or something.
Five kids. He is ridden. Led everywhere. Even when the stall door is opened, he doesn't care to go out and run free. He is simply too tired.
Six kids. No one has six kids.