How far do you insert the thermometer?

Definitely a few inches for sure, add in the occasional twist for good measure

Anytime I have taken a female's rectal temp I make sure both cheeks are spread really wide. I only go in about 1 inch, but keep pulling it out and putting it back in. Then I put it as far as it goes and tap it. My wife loves the end of the thermometer tapped when it's in deep. She says she can feel the sensations through her vagina. I am always very very careful with the angle. Almost lost one when I was a teen. She was on her back with legs way up. That would have been fun explaining to my mom.

Only about an inch. Anything more seems unrealistic.

When I was growing up, my temperature was taken with thermometers similar to the current Geratherm models. These thermometers were suitable for oral, rectal or armpit use, but mom (and the nurses at the hospital) only used rectal. They consist of a narrow tip, and then a thicker part. The method is to insert the tip into the rectum,.

I was very surprised when, a few days ago, a German lady on this site, about the same age as me, told me her mother would insert also part of the thick shaft of the thermometer. That lady was surprised my mother did not do that. It's so interesting how “normality” is defined by what one experienced. (One interest of pushing the deep part in is that the thermometer is then unlikely to fall out.)

In addition, a Zity member who married a Frenchwoman told me that this lady sometimes took her temperature rectally while standing in the bathroom and brushing her teeth. This is impossible to do if you insert the tip only unless you hold the thermometer in, and with a glass thermometer it takes 1 to 3 minutes. This does not seem too compatible with brushing teeth. I have to ask him if she used an electronic one, or if she pushed it deep.

With the glass mercury thermometer, it usually went in about an inch to an inch and a half.

I never had an issue with the depth of insertion.

One time though, and this may have occurred with others as well; the caregiver I had taking my temperature inserted the thermometer a bit too quickly and at the wrong angle. I felt it too! A tad unpleasant.

That's a little too deep... Nope, now to shallow... getting too deep again, Oops, almost came out... Wow, that really goes way in there... better pull it back a bit... Need to spin it around so we'll be able to read it quickly... Nope getting to deep again... I wonder why her anus is winking like that...

When I take a temperature for my patients, I initially insert only the narrow part and slowly push up to about half of the thermometer

I use a mercury thermometer

Always lubricate the rectum and not the thermometer itself

Half the thermometer.

When I was growing up my Mom inserted the rectal thermometer over 3/4 of the way in with just enough sticking out for her to hold onto to keep me from pushing it out.

About 5 cm with a Europan style glass thermometer - sometimes slightly more, sometimes slightly less. 😄

My girlfriend enjoys it when I insert the thermometer about 2 inches when she’s over my lap and almost all the way in while in a diaper position. I

prefer it halfway in.

I use a mercury thermometer. The best kind in my opinion. I Insert it slowly and twirl it a bit and eventually I will leave it inside me for about four to five minutes. I don't insert it more than I can safely grip the end of the thermometer. I don't want it to slip fully inside, since it is glass.

I like to insert the mercury thermometer very deeply. Then it is easy to feel, presses on the prostate and the stimulation of the thermometer in the bum is arousing.

Not much is sticking out for me. Because I was lubed up, I don't want it to go all the way in. I have enough sticking out for my fingers to grab to pull it out.

It depends on which thermometer is being used, 1 or 2 inches is comfortable for me.

Like @Anne20 for me it is:

Half the thermometer.

Vintage glass thermometers are a standard size, but butts are not. I enjoy the thermometer in as deep as possible, but not to the point where it might get lost. I’ve noticed that the temperature can vary with depth. Just into the anus, can be a degree lower than deep inside the rectum.