I have discovered that one of notable the differences between men and women begins at birth.
Whereas Grace was able to nurse and pass gas or fill her diaper at the same time as an infant, Henry must stop nursing and attain a thoughtful expression in order to perform such tasks. So there you have it. Women are better at multi-tasking.
PS It's funny that so many people think that picture of Henry looks like me, because when Alex saw it he said, "It looks like he should have a beer in one hand and a remote in the other." Except I would probably have a remote in one hand and a box of bon bons in the other.