I told her that it was for massaging sore muscles and this is, indeed, the way this massager is marketed.
For me, 5 to 20 minutes of masturbation is good.
While the scene does not depict Sally masturbating on screen, it's implied and later confirmed by her mother, Betty's, reaction afterwards.
I had the best wank, da-da-da-da-da.
How long before I can leave her? I've used a vibrator before, but I honestly don't like it very much.
But I also like to do it as soon as I wake up—I swear it gives me a jolt of energy to start my day—or right before bed.