Religion and relationships

Doesn't someone pick their own religion?
Since I don't have one, the religion he will know the most will be my wife's. Though he will be exposed to Buddhism just as much, it is not a religion.
However, I study religion, so he will be exposed to discussions to all of them.
He is currently in a Methodist school because that is the best pre-school in this area.
Young adults taught to think for themselves pick the religion, spiritual path, lack of one, that suits them best, when the time comes... I'm not worried about it.