calling
Explanation
The Joke
A character earnestly declares that they feel their calling in life is looking at books to see if they are readable or perhaps worthy of attention. Another character immediately deflects this lofty self-description by suggesting that maybe books are simply "dumps" — like trashy entertainment featuring women with giant breasts. The first character, rather than defending their noble literary aspirations, is asked why they decided to study premature art, and they sheepishly admit "I have my reasons" — implying their true motivations are far less intellectual than they initially presented.
The comic skewers the tendency of people to dress up their hobbies or interests in grandiose language. The character frames their interest in certain kinds of books as a "calling," but when pressed, it becomes clear their motivations are more base than they want to admit.
The Humor
The humor lies in the rapid deflation of pretension. The character starts with a noble, almost spiritual description of their purpose in life, but the other character immediately sees through it and calls out the more likely, less dignified motivation. The final panel's sheepish "I have my reasons" confirms the suspicion without explicitly admitting anything, which is funnier than a direct confession. Weiner frequently explores the gap between how people describe their interests and what actually motivates them.