These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Marcy: CB, my parents would kill me if they knew we let a homosexual in the house!
CB: Marcy, there are 7 people upstairs on ecstasy fucking in your parents bed.
Fridge Brilliance: Pen pal, C.S. (Charles Schulz), since the play is set in the Peanuts universe, is God, and the letter C.B. receives is an answer to his questions about what comes after death and an assurance that Beethoven, C.B.'s dog, and the bird are happy somewhere.
Alternatively, C.S. is Charles Schulz, who C.B. had been writing to all his life. Schulz used the letters C.B. sent him as the basis for his comic strip (Schulz at one point said that the Pen-Pal may be the person who felt the most sympathy for Charlie Brown in the original comics) and has played a sympathetic ear. Now that Schulz is dead in real-life, he writes C.B. one last letter from heaven, where he sees Beethoven.
Les Yay: Tricia and Marcy are accused of this at once point, and are horrified by it.
Tear Jerker: Quite a few, but especially when Beethoven dies and, to some, C.B. finally hearing from his pen pal.
Van's sister revealing why she lit the Little Red Haired Girl's hair on fire. Van's sister had gotten an abortion the day before sex ed, and as she tried to zone out and not listen, she read over the LRHG's shoulder. LRHG was writing a note about how glad she was that she was a virgin and was going to stay that way before marriage and how sickened she was by all the whores at school. And Van's sister snapped.