What does 'cold' mean? What does 'warm' mean?


Aside from the 8 year old 'hey go open a window' replies; explain a 'cold' sounding cable? A 'warm' sounding amp?

Moreover: do we all assume these are terms we universally nod our heads to in agreement, whatever they are? 
128x128zufan
Warm: my metaphorical hand... where they may go in dream but must not go in reality for the time being.... 🙃
No problem here.My favorite simile comes from an old friend who worked with me in a tiny hiend store in the 70's. We were listening to a Miracord TT (changer) with a Shure cartridge, MAC C28, MAC2105 all driving 4 ESS AMT's in a "wall" of sound configuration. After listening to most of "Dark Side of the Moon" at pretty high volume, my buddy, Gary, looked at me with a wide grimace: "Damn, that sounds like a can of nails!"Those were the days!