In my childhood, it was allways my mother who took my temperature (rectal of course) with one exception. When I was 6 or 7, the family doctor decided to check my temperature before giving me a vaccination shot. I hated it, as he was not as gentle as my mother. I played doctor with children my age, but we never got as far as taking a real temperature.
Then, at 17, I had a humiliating but also exciting experience as the schooldoctor, an attractive lady, took my rectal temperature as part of the yearly medical exam.
After that, I have tried to have my successive girlfriends share my taste for rectal temperature, with some success. So, today, rectal temprature is a part of the sexgames I play with my present girlfriend and it would feel very strange for me to allow a man to take my rectal temperature.
Anyhow, today, most doctor offices and clinics use earthemometer, so the problem seems not to exist. .