On the “kids with blue eyes” front, a high school biology teacher told me he treads lightly now when talking about genetics due to this story:
A teacher was giving examples of genetics with eye color, saying (and this might not be techinically correct, I’m not the biology teacher) “parents with brown eyes can have a blue eyed child, but parents with blue eyes can’t have a brown eyed child”. Of course, a brown eyed child piped up that he had blue eyed parents. “I guess they’re not your real parents” said the teacher. This ended up being true, and several unhappy family secrets got exposed thanks to the genetics lesson.
(I’ll also admit this could be an old joke/urban legend, but don’t you love the mine field that is a career in education?)
BtHR