Quadruplets?

Almost every single time I am out, with all four kids, I am asked if they are quadruplets.  Not by just one or two people, but about every five minutes.  With this said you have to remember that we are in a culture where most families have only one child.  How else would we end up with four, unless they were quadruplets?  (I feel for Judson, he must not be as healthy as the other three, since he is so small in comparison.)