A few points!
- I think that in Europe, at least in France, there was no distinction between oral and rectal thermometers - the same models were sold for oral, rectal or axillary use!
- The common case now is, if using a thermometer meant for insertion (as opposed to some infrared gun), to use an electronic one, but Geratherm and possibly other brands still sell glass thermometers.
- Keep in mind that electronic thermometers with a tip (for oral or rectal use, or also axillary use) are quite cheaper than infrared ones.
- Rectal temperature is, I think, considered old-fashioned in France but still widely used.
In this very recent video:
https://www.youtube.com/watch?v=XhCulHM5tZI
the lady comments, when seeing an electronic thermometer with a tip that it's an "ass thermometer" and says to the viewers "who wants me to take his/her temperature??". Apparently, to her, if it's not infrared and has a tip, it obviously goes in the behind (not the mouth)!
In this video from 10 years ago:
https://www.youtube.com/watch?v=FtzUCCvfyC0
a woman takes her temperature rectally and forgets to say to her partner where the thermometer has just been before he uses it orally.