One thing that this is making me think about is how extensive adoption is on Yap, but in a form that I don't really understand. It's very common for people to adopt, say, a sister's kid. It's not because of infertility or because the sister can't afford the baby, and I'm not actually sure why they do it. My sense is that they don't tell the adopted children who their real parents are, but it's more or less an open secret and everybody is living in the same village. I'm positive that there are nuances to the practice that I don't even perceive.