Maybe because it's a little taboo to use vegetables and you do not feel really confident to have a nice-looking carrot in your butt cramming.
Rest assured there are "more weird" things used!
You feel dirty and ashamed seems logical when your "experiment" with such things as vegetables.
Each experiment is strange and confusing but once you get it just makes you feel much better and you will realize yourself if it is something for you or not.
Have fun but watch what you put in your.