This has been going on in South Korea for a while, but to the best of my knowledge, only as a service to your own children or relatives: https://www.universityw

This has been going on in South Korea for a while, but to the best of my knowledge, only as a service to your own children or relatives: https://www.universityworldnews.com/post.php?story=20191023160207706 https://www.universityworldnews.com/post.php?story=201910231... Doing it in exchange for money may have been invented/popularized in the US.