LEJ, the first I heard the "tie my p*ck*r to a tree" song was in an early HBO comedy showcase thing by ...er, I hate when this happens...was it Tom Thomerson? Tim Timerson? Tim Thomerson? (Some guy who sort of has his first name in his last name and has acted in numerous films since then.)

'Course everyone knows:
Do your balls hang low, do they wobble to and fro
Can you tie them in a knot, can you tie them in a bow?
Can you throw them over your shoulder like a continental soldier?
Do your balls hang low?