Everyone's experienced that one co-worker who insists on dropping an air biscuit around the printer and copier, loves to warm up the stinkiest fish in a microwave, or forgets to flush the toilet after they go. For actors and crew members, they too need to put up with other people's disgusting on-set habits. It could be anything from a refusal to take a shower on a daily basis to someone's butt adding unnecessary sound effects to every scene. Whichever way, it's a gross experience for the people who need to deal with the perpetrator and put up with whatever's going down.

What's surprising is how many top A-list talent possess these "special" quirks. For instance, Robert Pattinson and Brad Pitt aren't renowned for being the cleanest people on a film set, so it's probably best to apply a 20-meter radius when around them on a particularly hot day. Also, it's...