Historically polygamy (man and more than one wife) has been practiced by many cultures. Sodomy on the other hand is considered unacceptable. I find many liberal females are uncomfortable with polygamy. Many of the married one will not be happy if their husband shows up with another woman and declares her to be his second wife. Let the ACLU legalize it, and you will see many liberal females question their own support for the liberal agenda.
Most cultures, I think.