Has nothing to do with gay marriage. Some would argue that being married reduces sexual activity over the long haul : ) and may decrease promiscuity.
And how will gay marriage effect others?
I will agree to a treaty. If gay marraige attacks your marriage, my wife and I will run over and help you fight it off. And you do the same for us.
"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus