Shambles
Bluelight Crew
Plugging evangelism ftw, Matador 
I've plugged too hot solutions before with minor discomfort but as there are so few pain-type nerve-endings down there (specifically internally - stretching the ol' bumhole too much (or scratching around the rim
) can be a mite sore) it's a legitimate concern, in my opinion. I'd imagine any damage caused by a solution that's overheated would be hard to discern at the time unless it was actually hot enough to cause proper scalding/burns. Would be best to keep the solution in the region of body temperature as much as possible but a few degrees either side is unlikely to cause any serious harm, in my experience.
As to the effects of a hot/warm solution, I do find absorption seems to be increased with a higher temperature. How much of that is down to a genuine difference in effect and how much is simple placebo, I really don't know. In my uneducated mind it seems like it should be more effective but, as I said, I have no actual evidence beyond subjective experience for that.

I've plugged too hot solutions before with minor discomfort but as there are so few pain-type nerve-endings down there (specifically internally - stretching the ol' bumhole too much (or scratching around the rim

As to the effects of a hot/warm solution, I do find absorption seems to be increased with a higher temperature. How much of that is down to a genuine difference in effect and how much is simple placebo, I really don't know. In my uneducated mind it seems like it should be more effective but, as I said, I have no actual evidence beyond subjective experience for that.