Foam Masturbation Finger!
You might have seen a young woman rub one of these against her crotch recently, but then again I can't account for your wherabouts, so it might not have been Miley Cyrus in your case. If you'd like to watch your own sex partner masturbate with a foam finger, you can now buy one for her, maybe for your anniversary or some other significant life event. They call it a "Twerkfinger", who sounds like a blaxsploitation Bond villian, which makes me want to buy one even more. Any which way, it's not truly a sex toy, but half of the things people rub on their genitals isn't anyway, so why not this too?
Via.