Since my youth, I have had a strong rectal temperature fetish but I discovered the ‘’diaper change position'' only when I was 25.
I used to be on my stomach when my mother took my temperature till I was 12 or 13. After that, as a teen, I took my rectal temperature frequently, often masturbating at the same time,, allways lying on a bed. At 18, at my last high school physical, my rectal temperature was taken standing up. Quite an experience.
At 25, I became involved in a wonderfull relation with Maria, a very nice and smart language student who was very much into medfet. We had a lot of sex, but it was allways on her terms. She had decided that, everytime we would have sex, she would impose a medical exam on me with lots of stething ending with my rectal temperature being taken on her lap.
The procedure quickly turned into a routine, and I must say I enjoyed it. But one evening, when tempsrature time came, as I was about to get on her knees, she stopped me and told me: ''We do something different to-nigh''. She had me lie on my back and bend my knees on my chest. I felt the position was not at all confortable, but I obeyed my bossy girlfriend. After a pause, without a word, she parted my buttchecks and inserted her thermometer very deep into my rectum. I felt the feeling of the penetrating thermometer was more intense than when I was on her lap. Then, she hold the thermometer in place, just playing a little with it as she used to. The feeling was fantastic, even though the position was less confortable. She kept her other hand in my hand in a very romantic, not to say sensual, way. I had a very strong erectuon and she could see all of it. She kept her eyes in mine as the thermometer registered and she told me ‘’' I enjoy seeing the expression of the face of the guy when I take his temperature, especially if he is going to fuck me''. Eventually, the ordeal ended. She withdrew the thermometer. As usual, she did not comment on the thermometer reading, but she invited me to fuck her. The sex we had then was fantastic.
As we were lying on her bed recuperating after sex, Maria asked me: ''Did you like the position I took your temperature in ?'' I complained I found it rather unconfortable, but admitted it was exciting. My girlfriend added: " I hope you did not find it too humiliating. You know they call it the diaper change position. Next time, I'll take your temperature with you on all four. You'll love it….'.