Okay kiddo, Femen is a group of ladies who want to show the world that girls are strong and powerful too! They like to take off their tops and write messages on their chests to get people's attention. They believe that women should have the same rights and opportunities as men. But some people don't like what they do, because they think it's not very polite to show your boobies in public. It's important to remember that everyone has their own opinions, and what's important is respect and treating each other nicely.