Collage shortcuts

It happens quite often that when achieving a collage, I must laugh or at least smile because the picture looks witty. Why? Surely because of the strange assemblage of heteroclite objects (see the famous definition of Lautréamont). Is it allowed in painting? Generally, one usually finds irony or derision today. Funny pictures come mostly from designers, I think. Is it because artists think themselves so important? In my collages, I like to go from one extreme to the other. Being a humorist would change me into an amuser. In my eyes, art can be more than that.