Another thing is why certain people wear jeans with laces, were the zip should be, I think that it looks silly, supponsing you were busting for the toilet or you suddenly had diarrreha, and you had to go to the toilet quick, if wearing jeans with a zip it would be easy and with a lace it's harder, to undo your jeans, it's the same with trousers or jeans with buttons.
I prefer zips on my trousers instead of buttons or Laces.
Tom