You're not going to find Sorority Girls in the Slimeball Bowl-A-Rama in a theater or Castle Freak for that matter. These are horror movies with a ton of blood, gore and boobs and will never see the light of day in the theater. B-Movies have been around since movies first debuted. They're all about the thrill and the skin and not so much about the plot. These movies are the dirty little secrets that you watch at 2 a.m. when everyone else has gone to bed.
These movies are filled with 20-something coeds that need to get undressed and have sex before running off alone into the woods. If some girl gets naked for no reason, then you can bet she's going to die next. We've seen the goods, so time to move on. Movies like these are bloody and violent to a fault. Sure, the mutant could just stab them with something, but that lacks finesse. Instead, he grabs a pole and skewers three people. I love B-movies and have been watching them since I was a kid.
You're not going to find a B horror movie rated PG. They don't have a lot going for them, so they make it up with pure sex and violence. They are made on shoestring budget with lackluster special effects and actors that either haven't graduated or never went to an acting school. These are some of the best movies made because they often make fun of themselves and never take the genre too seriously.