A: I found a new social networking site.
B: That's cool. What's it called?
A: It's called Tumblr. It's a blog site.
B: Is blogging different from Facebook?
A: It is very different, and much more fun.
B: Why is it more fun?
A: You get to see more people's posts.
B: What kinds of posts?
A: Many different kinds based on your interests.
B: It sounds fun. Is it free?
A: Yes, it's free.
B: Alright, I'll join. Just don't follow my blog.