interesting, i've never heard of a proctologist referred to as a "female doctor." i was under the mistaken impression that both sexes had anuses.
Inside my own butt? Hmm... Fingers, pens, carrots, zucchini, the pointy knob on the bed end when I was young, penis belonging to other people, whatever else I can't remember at this very moment.
So most random thing I've put in my bum would be a mars bar. It was my boyfriends idea, needless to say it was lots of fun.
I once used a corn cob using the rounded end but it was a bit big for me. Would have gone in eventually after some lube or butter was possibly used thou but I were about to go to get ready for work, so will attempt it sometime again but with more time on my hands thou.
stuck a mcdonalds toy barbie doll up my rectum when I was younger lad. Around 10 or 12 years of age. New from there on out, I am not gay!