My friend sang a very similar song and it went like this:

With my hand on my shoulder and what's this right here
This is my (head thinker) my darling my dear
Head thinker and that's what I learned at the camp. {clap, clap}

and it goes on the same with these body parts....

eye winker
nose smeller
boy kisser
chin chomper
heart beater
belly acher
hip shaker
knee bender
foot stomper