As for AIDS, it's a plague. We are human, we get plagues. They come along every so often, kill off two thirds of the population; in the next generation it's a quarter; after that it's a childhood disease. ↗
Unlike me, a lot of child actors are very short, which is why they work. So when they're 15 they can play 11 or when they're 18 they can play 14. They look young for so long, they have abilities a much younger kid wouldn't have. ↗
We've all seen the mom who devotes all her time and attention to her child and is so hungry for adult interaction that as soon as she's around another adult, she's not paying attention anymore. ↗