Love only goes so far...I'm not against gay marriage, but I am against swinging which is an example you wrote. I also don't understand threesomes. That to me is pushing it. If you write a paper, don't put that in there because you will alienate certain people who may not see anything wrong with gay marriage but do see something wrong with swinging and threesomes. Like someone may not be against gay marriage, but they are against swining and you comparing the two...well it won't end well for your argument.
Just my two cents.