Provide the theme summaries for the following conversation: 

#Person1#: Morning, Mary. I haven't seen you in a long time. What's up?
#Person2#: Oh, I took up a new hobby.
#Person1#: So you don't travel a lot now?
#Person2#: No, Frank. I'm much more interested in collecting stamps now.
#Person1#: It's certainly a popular hobby. I know a lot of people love stamps.
#Person2#: It certainly is. It's so much fun.
#Person1#: I believe collecting stamps has something similar to traveling right?
#Person2#: Absolutely. Through all kinds of stamps I am able to learn about the world.
#Person1#: Well, every stamp has a story to tell.
#Person2#: You're right. And I also meet many new friends while collecting stamps.
#Person1#: Good.
#Person2#: Sometimes we even spend hours discussing our collections.
#Person1#: There's a lot to share when you have a common interest.
#Person2#: Yes, it's really amazing. I got to go now. I'm meeting with some other collectors.
#Person1#: Ok, good luck. See you
#Person2#: See you, Frank.

Summary: 
Mary tells Frank she's interested in collecting stamps more than traveling. Frank thinks collecting stamps has something similar to traveling. Mary agrees and can learn about the world from stamps.