Having two children you find it is easier than having just one. You are a little busier. You get nothing but smiles as you announce that you have two and if you happen to have a boy and a girl you have reached perfection in the eyes of the world.
Having three children you find out that having three gives you a sense of what a family really feels like. In the eyes of the world you are still close to that state of perfection and you will be humored for your 'mistake'. Yes, you know what causes that.
Having four children you are a little busier than when you had three, but when everyone is at the kitchen table eating breakfast you say to yourself, "I can't believe I have four kids." And you smile. This is also where you begin to try the patience of your family, friends and acquantences who think you are nuts. Fending off the scoffers by this point just becomes a point of irritation.
Having five children, you take on the feeling, "Well, what's one more." You are already doing the work. What is an extra bed or pair of shoes? By this point, you are immune to the naysayers.
Having six children, well what's one more?