I am 71 Thoughout my life, I have had a strong rectal temperature fetish and I have shared this passion with most of the ladys I have lived with.
I enjoy as much having my temperature taken as taking my partner's. For me, rectal temperature is a way of making love, just like oral or anal sex.
Imo, rectal temperature has to be reciprocal. I take yours, you take mine. I also like the rectal temperature taking to last some time and imo it has to be done with an old fashioned glass mercury thermometer.
For me, the feeling of the thermometer slowly penetrating your rectum is such a wonderfull sensation, especially if the taker plays with the registering thermometer
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My most frequent position for rectal temperature thoughout my life has been on my ladyfriend's lap. I find the feeling of my hopefully erect penis on the lady's thigh so exciting. But my partners have often lead me to practice other positions, mainly ''in all four'' or the famous ''diaper change position''. I find both rather inconfortable, but admit they can be quite erotic. 'on all four'' gives the partner the opportunity to watch your genitalia and eventually to play with it. The ''diaper change position'' opens more the anus to the thermometer and allows for eye contact with the partner as the thermometer is registering . Lost of the women I lived with said they enjoyed so much seeing my face expression as they were playing with the thermometer in my ass.
I had a wonderfull relation with my last ladyfriend for more than ten years and thermometers played a big part in it. We used to take eachover's temperature on our lap every day, first thing in the morning. It felt so good, so intimate. Unfortunatelly, my girlfriend dumped me two years ago and I am now alone to take my temperature.
Still, after a few months of dispair, I have realized it can still be fun to take my rectal temperature.
I lie on my side, naked on my bed. I set my smartphone timer on ten minutes. I insert the thermometer real deep. Then, as one hand let the registering thermometer move very slowly back and forth in my rectum, my other hand plays with my erect nipples. I close my eyes and remember the good rectal temperature taking sessions I have had.