I introduced a vibrator to my gf a few months ago. She was not interested but with out my knowledge she started using it. Now, she is using it once a day. She cums at least twice in a sitting. In fact she bought two more in the Xmas sales and I found that she googling sex machines .. think it v was lovesense.
Oddly, she only uses it when I am not there. Makes me think one day she will move on to real recreational cock when I am not around.