Bristol Palin's babydaddy Levi Johnston is joking about using protection in a new commercial for Wonderful Pistachios. In the ad, the 19-year-old father is shown with publicist Tank Jones as paparazzi chant his name. Levi pops a nut in his mouth as the announcer says, "Now Levi Johnston does it with protection."

Levi and then-GF Bristol Palin welcomed son Tripp in December 2008. The teen dad and aspiring actor has apparently learned an invaluable lesson -- always use protection!