While our bodies produce cannabinoids endogenously (in our own body), the endocannabinoid system can be excited by greater than 140 cannabinoids, one of them being THC. The active component in marijuana. Marijuana can be fun, entertaining, a relaxing way at the end of the day. A social way to open-up, and entertain friends. There is really no shortage of effects that it may have on the human body with hundreds of active compounds present.