I had a girlfriend who was an R.N. One day she brought home a plastic speculum. After we used it to examine her lovely internal anatomy, she asked if she could use it to look up my ass. I told her yes, but to take it very slowly and carefully. It took a few minutes to get it all the way in, and it was a bit uncomfortable, but when she opened the bills and looked inside she said the view was very similar to that of her vagina. She gave me a mirror to take a look, and sure enough, I could see about five inches into my own rectum. I was pink and beautiful in there, and not unlike her vagina.