Link to The human sexes: 4-Passages of life documentary
Documentary Description
At every stage of life the rituals both join and separate the sexes. Our masculinity and femininity are emphasized at every such step. A step in to adulthood is celebrated in some way in almost all corners of the world. The very first ritual humans had together is probably related to food. When we went from eating vegetables (which is rather selfish eating if you think of animals who eats grass and the like) to eating meat it became important to share and eat together.