Wrong: that's exactly how you're doing it.
This is a video of a guy at a trade-show or something jamming his finger in some machine before finding out what it actually is. Which -- SPOILER!: is an automatic masturbation/collection machine for sperm-banks. I don't know about you, but if I were dude I'd be praying to the goddess of fertility right now it was just a floor model and not a return.
Hit the jump for a short video of the 'should've wrapped it up' in action.
Thanks to Nick, B-Low and anderson, who all know better than to go around sticking their fingers in things. Damn, I learned the hard way (glory hole).