*attempts picturing it*
I object to your rocking!
Present->Penis "TAKE THAT!"
Examine-> Semen stained bedsheets
Examine-> Passed out girl "What did I do last night? Besides her of course...."
Heh, hopefully the groupies won't be young teenage girls with small tits.
WHAT?
Everyone knows your status as a rockstar is determined by how huge your chick's (or groupies as the case may vary) rack is.