None of these calls are about touching butts, because that's ALWAYS legal in volleyball.
Beach volleyball is a confusing sport. Most confusing is why a game designed specifically to flirt on the beach turned into something that single genders are competing to actually win. Up until 1996, when the game officially became an Olympic sport, the highest honor one could achieve in the game was a hottie's phone number (male or female). Now that the cutscene from Top Gun has gone big-time, however, you need a ref and rules, which can get very complicated. Thankfully, the chart junkies over at Pleated Jeans came up with this helpful little guide, which will let you quickly figure out what's going on and get back to doing high-level calculus to determine the curve of....the ball's trajectory.