title: Override rails activerecord touch method
body: <p>Is there a way to override rails default method which touches the timestamps of related models?</p>
  
  <p>Example: </p>
  
  <pre><code>class User
    belongs_to :employer, touch: true
  end
  </code></pre>
  
  <p>I want to override the touch method which instead of touching the timestamp of employer should  do something else.</p>