sort of like the blood is blue unitl it hits air then it instantly turns red myth. My grandma believed this until I asked her what color it was when the drew it out for blood work. "But look at my veins! it's blue!" Well, your not wrong. Bless her heart.Actually that bit about how they "just google the answers" is made up.
As for leather eggs, that's the exception, not the rule. One of my aunts thinks that all eggs are completely soft and instantly harden when the air touches them. I didn't have the time to explain to her the mechanics of egg making and that her brothers were pulling her leg when they told her that.