Oy! You guys are a stitch.
I thought the female ones were more rounded on the bottom with more seeds inside, and the male ones more slender with fewer seeds. (That was not intended to refer to
anything but eggplants, you salacious people!)
I just bought an eggplant for a batch of ratatouille yesterday. The best one I could find was more rounded on the bottom. It proved to be VERY seedy.