The Etoro case study illustrates the importance of culture over genetic influences in determining sexual practices. The men believed that sharing semen with women drained a man's vitality, but it was a necessary sacrifice that a husband had to make to nourish a fetus during pregnancy. Heterosexual intercourse was discouraged and was not allowed at home or in the fields but took place in the woods. Boys acquired semen orally from older men to develop into men. What term is used to describe these beliefs and practices