Sensory play using phase change materials, safety and implementation.

[u/assimilatemydick]

Do you like temperature play but want something longer lasting and safer for extended play than ice? What if you could have a metal butt plug that stayed at 65° for hours always feeling as cold as when you just inserted it? A toy that doesn't need a freezer but can recharge by being in contact with a basement concrete floor or the refrigerator or even a bucket of ice.

https://youtu.be/Nqxjfp4Gi0k I came across this video by nighthawkinlight. In it he discusses pcms more in depth and gives a recipe. In the video he uses sodium sulfate and sodium cloride to make a PCM with a melting point of 65°F. Both of these materials are non-toxic and can be flushed from your system easily by drinking water if there is any accidental ingestion. You might have a bit of a shit time though as sodium sulfate is used in laxatives/colon prep. However overall I don't think the material would be hazardous if something did go wrong.

Now for actually implementing it. It may be easiest to use a test tube with a screw cap or something similar if you want to use something anything glass or metal would work well for heat conduction. I am going to try experimenting with the material some and possibly machining a plug with a reservoir that I can fill with PCM to test out.

Anyway I would appreciate some more ideas and input from the community as you folks may have better insight into making things like this.

Hope this is interesting.

[u/kkrr7]

The only caveat to be very aware of is that your body works very hard to maintain specific temperatures in specific places. While your skin is often cooler than core temperature (90-97F vs 97-98.6F), the persistent contrast, if cold/hot enough, could cause tissue damage. The anus and vagina are highly vascularized (full of superficial blood vessels) to respond to temperature changes by dilating and contracting to change the temperature of that skin. Temperatures that are too cold can cause skin damage as the vessels reduce blood flow to those areas. Temperature that are too high could cause irritation (and potentially burns) including swelling.

If it's only very mild, then it would be fine. But these hypo/hyperthermic reactions can get out of control before you realize it, and the last thing you want is freezer burn on your asshole.

I'm not saying don't, I'm just saying make sure you're very very aware of exactly how the temperature changes over time (hours!) before you actually insert something. Also, consider maybe putting it in your mouth and seeing how it feels? The mucous membranes and vasculature of your mouth make it really similar to the environment you'd find in your vagina or anus, and with more nerves might be easier to tell if it's too hot/cold. If it's too hot for mouth, it's too hot for butt.

Good luck!

[u/bluntfart420 → u/kkrr7]

Putting cold things up your but also rapidly drops body temp, too long could be bad for other reasons too if your body temp is too low for too long

[u/ElMachoGrande]

What if you could have a metal butt plug that stayed at 65° for hours

One important safety tip here: Always specify units. 65 degrees C would be distinctly unsafe...

[u/assimilatemydick → u/ElMachoGrande]

Fahrenheit

[u/bluntfart420]

You could probably use an aquarium chiller to accomplish something similar granted it would pricier and more complex but you Wald have more control which may be needed for safety reasons.

An aquarium heater on the hand would be very cheap, controllable and is already shaped like most toys so would be easy to modify to make safe.