"Quality of a man’s sperm depends on how intelligent he is, and vice versa" I don't think people know what "depends" means anymore. Especially the "vice versa"

"Quality of a man’s sperm depends on how intelligent he is, and vice versa" I don't think people know what "depends" means anymore. Especially the "vice versa" part. That means if you improve the quality of your sperm, as a direct consequence you will become more intelligent, which brings forward all kinds of interesting questions, such as do men really think with their balls?