I can tell you exactly what it is, because it happened to me before when I changed from one version of the insiminator to another one.
The objects like the red heart which is the relations adjuster was sticking out of one of my sims butts.
![Grin](/smf/Smileys/default/grin.gif)
and when I used the move_ objects cheat it said "plumb bob" when I picked it up.
and the funniest one was this sim man had the career adjuster stuck around his waist, even when he went to the bathroom. I had to use the move_objects to get rid of that too. I wish that I still had the pictures, they were hilarious.
![Grin](/smf/Smileys/default/grin.gif)
one more thing, don't worry because after you delete the hearts the regular plumb bob will come back.