Over time, waterbeds evolved to the point where they no longer had water in them. They're now called "memory foam" and they STILL SUCK. PTSD man I eventually ended up leaving the damn thing unplugged and piling blankets on top of it, then sleeping in a sleeping bag, then leaving the windows open so that during the winter my room got down into the 40s. Because if you're going to be camping on a fucking ice floe, camp on a fucking ice floe. The basic idea for waterbeds was "hey this scientifically unproven idea from the era of health enemas and leeches - how 'bout we perpetrate that on the entire goddamn public? It'll really piss off the hippies' parents and they'll buy 'em like hotcakes!"Eventually they came up with chambered designs and inserting a foam pad in the water to keep the sloshing down, and it prevented you from being ejected from the bed every time your partner climbed in... but then it was just a squishy mattress with finicky electronics that would sometimes leave you cold...
it's like touching a dead seal. In the middle of night. In bed.