An impossibly complicated topic to tackle in a short post but here goes:
Like the new Woody Allen movie: whatever works, basically. I think people should have the freedom, not just physical freedom, but the moral right, to do whatever they want with their bodies. I hate it, just hate it, when people take the moral high ground in, say, illegal substances. Many of them are far less dangerous than the ones that are legal and indeed the quantities in which they are used. There's a real injustice in they way substances are being labelled and divided into groups they don't fit in. The biggest problem we have in developed nations in this sense isn't drugs, but our relationship with food.
Regarding sex, I think consentual people, who can be considered responsible for their actions, should be able to have it however, with whomever, whenever.
I'm an atheist, and not just an atheist, but a person who subscribes to the scientific way of thinking and analyzing, the scientific method, and I will never understand beliefs, policies and ideologies that contradict scientific evidence.
EDIT: As if it were not obvious, I'd like to add that I'm not an advocate of violence in any way. But it is human nature, unfortunately, and I think we need better tools to deal with that contradiction.
Further edit: Politics-wise, I'm an anarchist thinker in the same vein as Chomsky.