Always has been. No joke, vibrators were advertised as massage devices since the 50s. Mail order war the way to go long before the first sex shops opened.

And they really are massage devices. I use a vibrator when I have muscle cramps in the back, and sometimes I use it to “shake free” the sinuses when they are blocked during a cold (roll a soft cloth around the vibrator and hold it to your forehead, the snot will start avalanching within seconds, free airways for the win).

Very useful devices I’d say.