Do you consider your mom "oldschool", or "old fashioned" because she was a strong believer in temperature being taken the old fashioned way... rectally?
Even if you did not complain because you found it a no big thing to fuss about, or if you didn't dare to resist to your strict mother, have you ever thought about it as a kid? I mean, especially if your were switched to oral as late as a teenager, (and to add the humiliation, your friends or other relatives were switched way sooner and younger than you) have you ever wondered that you have to endure the rectal temp takings because:
A.) your mom was raised that way, meaning her mother (your grandma) also did this to her
B.) or you always heard from her that "rectal temperature is the most accurate".
C.) she was overprotective,and thought even if you were old enough to hold the thermometer in your mouth or under your armpit, you are still a little boy/girl in her eyes