Old Wive's Tale

Have you ever heard this one...
If your walking toddler starts suddenly crawling around, this means the mom's going to get pregnant soon?
We were at a friend's house over the weekend and DS suddenly started to crawl around (like a baby!). All of a sudden, she turns to me and says, "you know what that means, right?"
She let me know that her friend told her this when she saw one of her kids crawling and the next weekend she got a BFP

When I told DH this, he said it didn't matter because the only old wives tales that work are the ones that are passed down from our parents, not from our friends