I was thinking while driving today about this.
Isn't it interesting how depending on the state of matter, "Hot [something]" can have different meanings?
For example, if someone is spewing "hot air" (gaseous state of matter), they are speaking or writing in a pretentious or exaggerated way.
Then, if someone is in "hot water" (liquid state), they are in some sort of trouble.
Finally, if something is classified as "hot stuff" (solid state), then it is sensational, particularly interesting, or even arousing.
Just a thought.