It might be the smell of grease-laden pizza out of your high school caf or that nasty perfume other people you know wore all through that one smoggy summer, but you won't ever get those smells from your head, smell is memory. Smell doesn't call to mind the outside, it reminds you of who you were on the inside. They call to mind simpler days, or more complicated ones. Things change, people change, you may have changed, but the smells will always remind you of who you once were.