I saw this topic about burnt to death or freeze to death and i thought, what would you choose, no arms or no legs?
I would choose no arms, because you can still walk and run, but it's very difficult because people have to help you a lot, you can't wash yourself without your arms..
Endorphins are neurotransmitters produced in the brain that reduce pain. They also induce euphoria. Drugs such as morphine, heroine and cocaine are classic endorphin-releasing entities.
They induce the release of imitative (not natural) endorphin-like substances. Also it is believed that morphine and heroin combine with the endorphin receptors in the brain, resulting in reduced natural endorphin production. As a result, the drugs are needed to replace the naturally produced endorphins and addiction occurs.
Exercise, sex and even eating chili peppers are natural ways to raise the production of endorphins. I don't think that persons who need morphine can do any of these.