The decision to have a second — or third or fourth — child is one that will change your family forever. And if you're still on the fence about whether or not it's a good idea, we've got some great reasons to give your child a sibling. There are some things that only brothers and sisters understand, from childhood to those tough transitional years, and throughout the highs and lows of being an adult. Here, captured on the camera, 20 moments that can only be shared with a sibling.
Source: Flickr user james goodman