Why should I wear dental floss? Is brushing not enough?

The dental plaque builds up every day and is only effectively removed by a mechanical action so
just rinsing with water even with any oral elixir doesn’t do the work.
There has to be a mechanical action provided by a good brushing technique, with special
attention to the sulcus between the gum and the tooth, and the use of a means of interdental
cleaning either by flossing or by dental brush.