I somehow came to the realization at a very early age that the only "sin" one can commit is an action that infringes on the freedom, happiness or well-being of another.  Some think that this reasoning allows one to harm (kill, abuse drugs or alcohol, or engage in other risky behaviors) oneself if they so choose but it must be realized that self-harm is not done in isolation - parents, siblings, children, and friends are all harmed (pained) when one harms oneself. Other than that consenting adults are thereby free to pursue whatever makes them happy or gives them pleasure.

- Mike