An acquaintance of mine basically kept trying to have a baby boy after having had only daughters previously (4 of them!). I personally find it shocking that there can be such a preference for male progeny in this day and age. Note, I am talking about clear preference for a boy, not trying for another child of a different gender.
YABU: it is normal to keep trying pregnancy after pregnancy to get a baby boy
YANBU: it is weird as hell to keep trying pregnancy after pregnancy to get a baby boy