For those of you like me who are too young to have gotten them through childhood, what started your fetish?
For me, I saw it in the movie Dr. Dolittle with Eddie Murphy when it came out, and then the cartoon Baby Blues. The rectal temperature scenes confused and thrilled me growing up, and became central to every game of house with dolls. I was really frightened by it, but also super curious. When I was ten, I started looking at voyforums and things online, and started putting pencils into myself, and even had my first orgasm this way before I learned what any of that meant.
Now I have my first proper glass thermometer 😃