Most of the reddit community are strong supporters of same-sex marriage. So am I. However, is there a form of love, or a type of relationship that could not see yourself tolerating?

Let me be VERY CLEAR on this. I am not suggesting that same-sex marriage leads to anything like incest, polygamy, or adult relationships with minors. But, in the far future, can you picture yourself supporting ALL possible types of human love? Is there a limit to what you can tolerate?