Handy tips for masturbating discreetly in public

Some people are born perpetually horny.  Since sex with a partner isn't always an option, we often must satisfy ourselves. For most, masturbation is a private act performed alone in the shower, closet, laundry room, or in a locked bedroom.  But what if the mood strikes at work, or your house is filled with people?  What if you simply don't have enough time to dedicate to a boot shaking climax?

Here are a few quick solutions:

Hide-a-Vibe:  Is it lipstick or a tiny vibrator?