Ah, the long awaited Promised Post!

Well that's a spin on the 'paternity uncertainty principle' that I had neither thought of nor encountered before. From the title, I actually was expecting unborn babies of different sexes duking it out!

Freud suggested that at some point in childhood little girls notice something is missing when they look down at their own bodies and at the bodies of little boys.

By parity of reasoning, boys should have boobie envy? We do seem to seek them out...

Certainly, this proposition is no more ridiculous than Freud's.

True! I quite like your idea and phrasing. Which means that I should like Freud's too! I don't think just calling it ridiculous will do. We should figure out a way to test it. Maybe it has been. People don't seem to like Freud anymore and most of his ideas seem to have been debunked, though I'm unsure about the specific one.

Interesting, readable, and well-researched post, and the Freud part was entertaining! 👍