@GerHarren, to be as specific and comprehensive in answering your OP queries as possible:
How old were you, when you started to feel embarrassed, humiliated annoyed or anything like that about rectal temperature taking?
Answer: Never to this day ever had any of those 3+ feelings about RT’s, now age 71+ (72 next month).
When was the first time you tried to resist, or convince your mom about other methods like oral/axillary?
Never, not once.
I mean, strictly speaking about home temp taking with your mother, not at the doctor.
Good point, noted. Mine nearly all at home by RN mom. Rarely at doctor visits.
Even if you did not fuss about, just obediently submitted to it, laying on the bed, what was the point when you started to say that "Mom, I am way to old for doing this way" or maybe also saying that "Why I have to lay down on my tummy? I can hold a thermometer in my mouth!"
Never started. I cannot imagine any reason I would think that.
Or thinking while the thermometer is in your bottom: "My friends must be on oral temp, why would my mom want me to take rectal like I was 3 or something?"
Never ever had that thought.
So I am basically curious about your age when these thoughts appeared in your mind, and what were your thoughts exactly?
Never appeared in my mind ever. My only thoughts were “I kind of like the feeling of that Vaseline®️-lubricated glass thermometer mom puts in my butt, mom is an RN Nurse and a great mom, she thinks I might be sick and this must be the best way to do this.”
Occasionally she would use a glass oral thermometer instead of RT, but preferred the more likely accurate rectal route. Either was fine with me, but orally I had to keep my mouth closed around the thermometer so it was actually easier for me rectally.
@GerHarren your OP queries suggest you really didn’t like RT’s or thought they were embarrassing or annoying. What was your experience?