Under the original post you made (the first post in the thread - created by you) under your signature, will be the list of people that hugged you in that thread.
You hug someone by clicking the " + Hug +" button under the signature of the original post to most threads created.
If you look in any thread in one of the Support Forums, you will find a button that says +hugs+ on the bottom-right corner of the first post. By pressing this button, you are giving "hugs", and your name will appear underneath the post [along with any others that have pressed the button] to say that you have "hugged" the thread-starter.
The "hugs" system is there to show you care, even if you don't have any advice to give at that moment, and is designed to try and stop short replies consisting of only "*hugs* xx".
