do what you feel makes you happy as long as you don't go break no laws, listen to paris hilton, work for the disney channel (lol). but in all seriousness as long as you do things that compromise your moral compass and can tell when enough is enough i say have at it. we've all sinned without a doubt what you do with the knowledge of what sin is up to you
We all "sin" because it has been arranged that it is impossible for us not to. "Sins" are all things that we cannot help but do. It's an insidious trap, but a clever one: make us feel guilt for things we are definitely going to do and will will come crawling back for forgiveness time after time. In monotheism it's based largely around sexuality. I've heard of other, tribal religions with the same trap, but based on food.