planned obscelesence. They change the fit on clothes slightly every year
or sometimes every few months to make older clothes look out of style
so you have to spend money buying new ones. Women are well aware of this
concept; hence they spend half of their paycheck trying to keep up with
the latest fashions. You might not notice the variations in the size of
your shirt collar or the taper of your jeans but women have eyes like
hawks for this kind of stuff.
