... many of the female hitters that I work with will take cues literally ... and hence the need for explanations.
I have noticed that female players do tend to take things more literally than male players, at least in my experience. But I have also found it important to be able to explain concepts in multiple ways and be able to demonstrate them. Some students need the visual association. Some can learn from video with explanation (my DD likes this method). Some can work from cues. The teacher needs to be able to adapt to the strengths and weaknesses of the student in order to bring out the best in him/her. I appreciate the introduction of alternate ideas (such as this belly button cue) because it offers me another method of getting the message across. The more I know and understand, the better I can become, and more importantly, the more I can help those I work with.