Make that 'little man'. As to why you seldom see Navajo twins...
If you have twins, one is good and one is bad. You cannot tell which is which, so you kill them both.
Now Navajo men have it made. They can have more than one wife so the average man has three wives. Why three? One takes care of the kids. One watches the sheep. And the third goes to town to earn money for the man to spend. And the women sit in the back of the pickup.