Male and female squash plants? and saving squash seed

I was instructed by an old timer here in the local community that there are male and female squash. In this particular case we were talking Cushaw and Georgia Candy Roaster squash. He said you could tell the difference in the squash by the size of the scar on the blossom end of the squash being that female scar would be larger than the male scar. That if I wanted viable seed I needed to save them from the female squash. Anyone ever heard this before. I thought there were female and male blooms on each squash plant and that only the female blossoms would produce fruit. Did I just get a sex ed lesson that was accurate?
Also, am I to soak squash seeds and let them ferment as I do tomato seeds? I was told to soak them and that the viable seeds would sink to the bottom as tomato seeds do when fermented. Seems to me that squash seed would sprout before fermenting. I have just always separated them by hand, rinsed, and dried.

Never heard of that. Male and Female flowers - yes. Different fruit that has gender?

Hope they aren't pulling your leg. I have a feeling there was a misunderstanding.

Never saved any squash seed but it sounds like you have a good handle on it.

Females bear the fruit and males are fruitful in the multiplying sense but otherwise fruitless.

This post made me smile as I recalled the time I was taken snipe hunting by those older and wiser timers. :) The joke was on me but, in this case, I don't think the old timer intended to pull your leg. Most of the time their advice is good. Otherwise they believe the information being shared is true. It's well intended help based on anecdotal evidence, not scientific fact. I am a specialist in obstetrics. The size of an umbilicus (belly button) is related to the length of gestation. Folks with big buttons generally hung around longer. If I were to carry that over to vegetables I'd guess the size of the blossom end might be related to the length of time it took the female fruit to become fertilized along with the general health of that fruit. I wonder???

Seeds should be dried and not fermented. You risk sprouting or mold otherwise. Viable seed will look full and non-viable seed will be flat and sunken. It's true that non-viable seed will float and viable will sink but at the time of seed harvest your seed should be matured in the fruit for at least six weeks.

Laurel, you are correct in the assumption that he believed what he said and I took it with a grain of salt, not wanting to correct him and risk offending or embarrassing him (or myself). The information he provided went against anything I had known to be factual but he is a farmer and I'm not. Originally thought it was a Southerner pulling a little Yankee leg. Oh, and I learned about snipe hunting from my Southern husband about 45 years ago. Thanks, Ann