I'm an only. I've always been a bit wistful about not having siblings, and I think it bothers me more than it should. Apart from the practical advantages that come with having siblings, including having another family member to lean on when you're in a crisis, looking out for each other, and being able to share the burden when a parent dies, I don't really understand the logic in choosing to only have one child. I don't actually know anyone in real life who's an only, apart from me.