I'm not convinced it's the same. When talking about dating, there are a bunch of stuff that you can do that boils down to "make yourself a better person." See: my list above. It's obviously not guaranteed, and many are more genetically gifted than others, but it seems way more manageable of a task than your example.
You can't expect women to work on having more of a penis.
You can't expect women to work on having more of a penis.