poikilothermy
i would like to put forward the notion that i am, in fact, cold-blooded. i know what you're saying, that i'm a mammal, and therefore naturally warm-blooded. but by changing a few words in the referenced article to point to human characteristics, voila! i suddenly pop out of the definition:

Poikilotherms have behavioural means of temperature control; they can warm themselves up by basking in the sun, or shivering [wearing many layers often made up of wool, or finding a human space heater], and can cool themselves down by sheltering from the Sun under a rock [in cave-like home dwellings] or by bathing in water [merely going outside].

i would like to say that i made it a point to do some sun-basking this weekend, dress in layers, and once warmed, found myself a bit hotter than my normal space-heater.
i rest my case.
current mood: i'm hot... no wait...