Nov 1 2010 Life is full of surprises! Many mamas spend their pregnancies dreaming of lil tutus only to be shocked when their doctor declares, "It's a boy!" While a woman may love all that comes with mothering sons, she may need a class in why trucks, bathroom humor, and fast cars have fascinated boys for years. Jenna McCarthy's latest tomes, Big Rigs For Moms ($11) and Tea Parties For Dads ($11) do just that. They each cover 25 topics parents should know.