I chose the eyeball because I have a great love/fear of eyes. I think they can be absolutly gorgeous but I can't stand and watch someone put eyedrops or contacts in. I just think it is kinda gross. I watch some eyeball surgery on PBS when I was young and I remember the eyeball just floating there in the socket. I was watching it bob up and down as the doctor was doing surgery on it. I think that was enough for me. However, I remember I just kept watching, utterly fascinated, but I never did after that.
I remember the scene in A Clockwork Orange was a bit much fo rme.