title: Is it okay to use an id for <p> tags?
body: <p>My coworker is telling me I shouldn't use id's for paragraph tags...
  I think it's the way to go if you know you're only using that kind of paragraph once on the page.</p>
  <p>He also says that all elements on a page should only use class and not id, unless you are defining a header, container, or footer.</p>
  <p>I am fresh out of college and I learned to use id for things that will only show once on a page, while using class for things that will show multiple times on a page.</p>
  <p>Which way is proper?</p>