A heated dojo? I thought our bodies were supposed to heat the dojo.
only live bodies, and only when huddled naked to save you from hypothermia, which i don't think anyone want to do aikido naked, especially, when you have to do some of those pins. god forbid if you have to do some of those bjj arm bars while naked or worst by pulling guards.
on the other hand, dead bodies (all dead, not mostly dead) wouldn't heat the dojo very well. the only thing you can do with dead bodies is "Go through his clothes and look for loose change"