There’s a subtle theme throughout the book of trying to find a place where one belongs. Be it in a spiritual/religious manner, or a basic mundane sense of purpose, everyone seems to be scrambling to find something to hold onto before they die. Binx seems to have a solid hold on looking for his in searching for God or an ultimate purpose. Everyone else just falls into their places in his life and enter an exit on cue as he needs them or as he deems fit to let them. Kate and Sharon seem to be the clearest examples of the trend since he only focuses on them when he needs something to make himself feel better. Other than that, he continues switching his affections between them when one isn’t available. He ultimately gives up on his goal of finding God or a purpose and switches to a lifestyle of doing what he wants when he wants.
Which, coincidentally, he was already doing. The subject of everydayness becoming lethal and making one grow stagnant is a running theme throughout the book, though Binx himself fell into the trap himself despite his attempts not to. He has a set routine of going to work, going to the movies, and going home like clockwork, and the only changing variable in that equation happened to be the movie time he went to that day. His routine going to movies is part of what spurs him into “action” trying to find God. Binx witnesses action heroes getting into situations that are mundane to those watching, but they always come out on top. Binx wants a life like that, but ultimately succumbs to the mundanity like everyone else.