The first post was made from a fetish point of view. It has no value as measure of general fever, and it is probably difficult to find anything about it in common medical textbooks. I have for a long time gathered personal histories from real life experiences. Regular measure pf urethral temp for boys in the preteen and early puberty period crop up with regular intervals on the histories, even if I do not ask about it Some may just add this as a fantasy to make their history more juicy, and sometimes the caregiver might do it for own sexual gratification. But still there is such a regular pattern to this, mostly by use of modern digital thermometers with a long tip, that I think it is a regular practice in certain medical settings. Possible explanations might be.
- The temperature in the penis and scrotal area at certain times of the day, especially early morning or late evening, might be one of several measures of the pubertal process
- One uses it on boys which is often sick to detect early signs of urethral infections
- One uses the thermometer tip to apply salves with medicine in the penile and scrotal urethra to prevent or treat infection or to influence the pubertal development with hormonal therapy.
- One uses the practice to make the boy used to intimate procedures as a psychological preparation for a planned intrusive examination.
- The thing used in the urethra might have been a special syringe for applying medication into the urinary system, and not a thermometer.
- In some avantguardistic and semi-secret modern settings one might use a handy and thin electronic probe to inspect the urethra, scrotal and prostate area of boys, especially for development monitoring. The instrument might multifunction for ultrasound exam, endoscopic view and other measures and might communicate with monitors with radio waves, and is therefore mistaken for a thermometer.