Steve-O Battles the Global Dork Epidemic

Ever had a penchant to stick your junk into the mouth of a wild animal? Or take a beer bong in the, well, you know? Well, good news sickos -- the Dr. is in.

Dr. Steve-O -- yeah, he's a traveling psychotherapist now -- is going on a mission to cure that problematic little voice in people's heads that tell them not to do stuff ... in an effort to help these "wussies" live more fulfilling lives.

Click here and let the Jackass himself explain through a brand new rap song exclusively obtained by TMZ.