How Many Kids Should You Have?

My current thoughts is why I write this post. My doctor and parents started this discussion with me and therefore need my immediate decision...

I got this image here.

Before we settled down, Hobbit and I thought and discussed about having kids. We said we will have, to the most, TWO kids. As years passed by, we got married and slowly witnessed our married friends had their own kids. The process and the 101 things that our married friends had to go through with their kids, we captured them all and even tried to put ourselves in these new parents' shoes. We thought, too overwhelming...and we slowly brought our number of future babies down to ONE and to some point...NONE. 

Then the time came. We were ready...However, it took us quite awhile before the ONE miracle happened. :) Now that the ONE is here, should we think of the TWO, so we stick to the original plan?? Well, question like this is not an easy one for any parents I am sure. I am driven to think of how our grandmothers and grandfathers survived with a dozen kids yet to have two nowadays is already a question. Is it money or time? Or is it selfishness or freedom? What is it that hinders most people to have more than one child nowadays? I really want to know. Let me play my yoyo toys while I slowly work on my fingers...