Yes, I understand humor in all of its many forms. What you don't seem to understand is that the common thread is always, inescapably, AMUSEMENT.
Clockwork is not (except, of course, among the ignorant, morally undeveloped teenage boy set), nor was it intended to be, amusing on any level The juxtapositions and incongruities that simpletons like yourself dismiss as dark humor are, in fact, dripping with symbolism and have serious intent. The film is a severe parable, rich in metaphors. And they're not there for the viewer's amusement, genius. They're all completely loaded.
Clockwork is a satire. That you equate this with "Clockwork is humor for a moral purpose" speaks to a dim, uneducated, juvenile mindset.
Try reading serious reviews and criticism of the film if you'd like to learn. Posting links to insipid websites like "rotten tomatoes", or one review from 35 years ago that stands in contrast to just about every other one out there, does not impress.
Educate yourself, young man. You'll be less inclined to make a horse's ass out of yourself.
P.S. Since you apparently haven't the slightest clue as to what constitutes dark humor, rent Kubrick's "Dr. Strangelove". That should help.