I used to like them a lot when I was young. But as I’ve gotten older I’ve started preferring chilly beds when I go to sleep, not warm ones.
Woo. There’s been tons of studies on the possibility of EM fields causing cancer, and by all the evidence they don’t. If they do the effect is tiny.
Also, nobody even knows how they* could.* So assuming they did cause cancer, there’s no guarantee than a lower voltage wouldn’t increase the risk instead of lowering it.