Why Might a Man in Traditional Kwakwaka'wakw Society Designate a Part

Why might a man in traditional Kwakwaka'wakw society designate a part of a son's or his own body as female and marry it to another man?

A) to form the strongest possible political alliance
B) to gain access to use rights to the "husband's" land
C) to allow wealth and titles to be inherited if the man had no daughters
D) to have a homosexual relationship publicly recognized