Quora

I read an answer on Quoraof the question What are the most productive ways to spend time on the Internet?

Someone thought Listening to others' problems would be a useful way to spend time on the internet. So I checked and got hooked.

The sense of satisfaction it brings when you can make a sad person smile is great.

I can't find the answer now, but I am really thankful to the guy who added the answer on Quora.