Can anyone explain a David Lynch movie?

Every so often I’ll brace myself and try yet again to get through a David Lynch movie. I’ll say “Maybe you were just having a stupid day, and were too flighty to get it.” The only one that made sense that I know of was Dune, and I have to assume that it was because he had no hand in crafting the actual story. I’ve made it through Blue Velvet many years ago and I plan to try that one again someday. I also watched Lost Highway and Mulholland Drive. I didn’t get any of them.
Tonight, I just forced myself to sit all the way through Eraserhead. Not only did I not get it, I anticipate difficulty in sleeping.
Who was the scabby guy at the beginning and the end? What was up with the Carol Channing looking chick with the golfball cheeks? What was the point of those umbilical cord looking things? Why did the Cornish hen kick and spew goo? WTF was that “baby” all about? Why did the main guy’s head just pop off? Why did the kid scoop it up and run with it? What was the idea behind the guy drilling a core sample then slicing it into erasers?
I was thinking about watching the tv series that he was responsible for from a few years ago, I have them in my netflix instant queue. Now I don’t know if I should. They may push me over the edge. Can anyone explain anything about David Lynch movies or is there really nothing to get?