Developed by the Korean company "Taff System" for the Korean and Japanese market (but un-released in Japan), Boong-Ga Boong-Ga (also known as Spank 'em ) is the first arcade game that simulates anal probing. You select from eight characters like "Mother-in-Law," "Con artist," and "Child Molester" and then you ram a giant plastic finger into a jeans-covered bottom which protrudes out from the arcade unit next to the words "HAVE A FUN!! ENJOY." As you poke, spank, and probe, the game plays an animation of your victim wailing in pain, and then the game rates your sexual virility based on the impact of your finger against its virtual colon.