I'm immune to things like this, after a decade on getbig.
But it was pretty disgusting ass-shaking going on right there.  It wasn't a bodybuilding pose, it was a twerk mixed with a grind/thrust thing.  
Tough to argue this one, and I love to argue for the little guy.  But imagine all 5 competitors up there, doing identical ass thrusts.  Attendance with anything family related goes out the window there.   
it SHOULD be in the rules - no sexually suggestive dancing.  Was it?