I love biology. It's a scientific subject. It is a very investigative subject which has existed for centuries. Amongst prehistoric people who were scientifically talented, it involved observing basic differences between living and non living objects. One of these was reproduction. It's a very visual science too, more concrete perhaps than a black hole. It often still relies on observation.eg microscopy.
Early biologists noticed long floppy bits between the legs of some adults, and two round floppy bits on others. They invented words for them. The words had meaning as the latter bled and little babies sometimes came out of them. This had nothing to do with their brains or their emotions.