Cat vs. panel heater: which is better?
I was once desperately poor.  Too poor to turn on the heat.  But I did have access to friendly cats, so I've been through this experiment in real life.<p>One cat stuffed under the blankets at night is a significant improvement.  But as you add more and more cats, the improvement becomes only incremental.<p>I eventually learned that two cats was really the best one could hope for.  Best positioning is between the legs, and with the blankets pulled up over my head with a little crack for breathing.  After that, adding more cats doesn't help much.<p>If I was still cold after two cats, I had to break down and turn on the heat.