No. It was a report in the ridiculously unreliable Lebanese media that people jumped on because they wanted it to be true.
If you look at different pictures/video of Ambassador Stevens that night you will see in one image his belt buckle fastened, zipper up and pants pockets tucked in.
In later pictures you can see his belt undone, zipper down and pockets turned inside out.
I suspect they probed his rectum with blunt objects just like they did Gaddafi.