Throughout human history, pair bonding has been male-female to produce offspring primarily and safety, survive-ability second. Nowhere in human history is there evidence that same sex anything has evolved to be accepted. So, here we are in the 21st Century and we are so modern and developed that we can tolerate a few variations on this theme, that's great. Marriage is the preferred route, but for those who don't meet the ideal (man and woman) that our society is willing to sanction publicly, can still privately contract with another and obtain greater protection under the law than marriage offers. So, why not create a solution that addresses a system clearly not organized to support a peculiar situation?Why force change on the rest of us?