Oh yes,..mom's finger! My sister and I occasionally think back to those days when mom was the "family nurse" and treated us whenever we were sick or got hurt.
I remember the time when I was about six years old she asked if I had a bowel movement recently. At first, I would always say "yes" automatically. When?... was the next question. I'd say this morning (very unconvincingly) and she would say, "well let's be sure you are clean." Then she would pull my panties down, bend me over on her lap and smear vaseline on her finger and insert it into my rectum. She pushed it way up to see if there was anything there. It seemed that her finger twisted and turned reaching all around (hoping, I swear!) to find something.
Usually she did and would try to determine how much was backed up in there. I remember one time when she "hit the wall", not too far in, she took a rectal thermometer and pushed it in as far as possible and then remove it. If most of the thermometer was covered with feces, she scolded me for lying to her. A good enema would follow.
I noticed that when she did the finger feel, sometimes it stimulated me to want to take a poo right then and there, as she pulled her finger out. Usually it was just a withdrawl "sensation" and nothing happened.
However, I remember one day she had my younger sister over her lap and was doing the finger test. Although she didn't hit anything at first, my sister said "I've got to poo", but mom said, "I don't think so, I can't feel anything," but you will need an enema. As mom was pulling her finger out, 'sis screamed "I'm going" and just as the tip of mom's finger was just exiting her anus, so was a very soft and somewhat watery brown bowel movement! Mom jumped back slightly as the poo squirted all over sis's bum and mom's hand;...she was shocked! "See, I told you mom", said my little sister. Mom grabbed some tissues and covered the mess and then carried her to the bathroom and put her on the toilet where more came squirting out. It took some time for mom to clean up the whole mess. Mom was annoyed but said she would listen to us more carefully in the future. Secretly, I admit today that I wish I was the one who soiled mom's hand and made the mess. That would have paid her back, as I hated those finger exams.