I hate zippers and wish more clothes had buttons in place of them, especially the fly.
A zipper fly's rigidity and metal teeth are at odds with the flowing elegance of clothing. When seated, the zipper fly props itself up, informing others that I'm happy to see them, even when I'm not. The zipper fly is a liar. Whereas the button fly does not lie. It acquiesces to my position in honest fashion, whether I'm seated or standing.
That's not my experience - denim is generally stiff enough that it will bulge regardless. And button flies have the bad habit of becoming unbuttoned throughout the day if the pants are old enough.
A zipper fly's rigidity and metal teeth are at odds with the flowing elegance of clothing. When seated, the zipper fly props itself up, informing others that I'm happy to see them, even when I'm not. The zipper fly is a liar. Whereas the button fly does not lie. It acquiesces to my position in honest fashion, whether I'm seated or standing.