[kqr]

We didn't always care to this accuracy. We just used the anal temperature and went on with our day. Then we got the ear canal thermometer for convenience and discovered that the result was not what we expected, so I got curious and started keeping detailed records...

But in the end, I want to get to the point where you are, using a rough rule of thumb. I'm just taking the evidence-based route there!

[kqr]

Hah! I just now realised the English word is "rectal" not "anal" but it seems my comment influenced plenty of other people to use the wrong word too!

[bombcar]

The name matters much less than making sure you don’t get the various thermometers confused.

[WelcomeShorty]

I learned that from the move Madagascar :)

https://www.youtube.com/watch?v=rQ8m2UqIgrE

[fnordpiglet]

Only an anal person would care. You’re good.