It's not surprising that a colorful and lively show like Sesame Street, one devised by the genius that was Muppets creator Jim Henson, was at heart a comedy. What is surprising is that so many adults who grew up with the show still find it so damn funny (or maybe that has more to do with the rise of marijuana use, but beggars can't be users, er, choosers).

In fact, a recent box set of the show's earliest episodes came with a disclaimer that the episodes contained within it were "not for kids." That's also because it contained the rare lost episode from the early 1970s when Grover and Prairie Dawn accidentally wandered into the Plato's Retreat swingers club where they learned the difference between "top" and "bottom".

The point is adults can find just as much to laugh at as their kids do and here are the biggest chortle-makers.

Sit a kid in front of a TV for an hour a day and a parent is bound to find something that offends them, other than the fact that plopping impressionable minds in front of a TV unsupervised is considered "good parenting."

Sesame Street is no stranger to controversy. Critics, cynics and crybabies have called out the show on everything from questionable behavior to the ambiguous situations...of puppets. Of course, all of these complaints and cackling criticisms just scratch the surface of a much bigger issue that has largely gone unaddressed: the total loss of our sanity and grasp on reality.

So as we look back at the last 40 years of television's greatest children's show, we see some speed bumps along the way. These are the ones that caused the greatest loss of tire pressure.