Dear Steve,
Thank you for your email message! I'm glad to hear from you again! I think collecting mugs is a unique hobby for your brother!
People collect things for various reasons, like nostalgia, personal interests or simply the joy of finding and having rare items. As for me, I collect coins from different countries I visit. I also have a small stamp collection that I started with my grandfather. In my country some popular hobbies among teenagers include playing sports like basketball and soccer, painting, photography and gaming. But one of the most popular hobbies is probably music.
Anyway, I've got to go since I haven't done my homework for tomorrow yet.
Write back soon.
Best wishes,
Anna