Really feeling suicidal is basically having a mental breakdown, but realizing you have nothing nice and sharp to use.
Lack of Sharp Objects
Explanation
Explain Bear
Alright, you big ol' dummy, this joke is super dark, like a bear's cave without a flashlight. It's saying someone is at the absolute lowest point, ready to... well, you know, but the only thing stopping them is they can't find a pointy thing. It's messed up, I know, but that's the dark twist, pal.