There's really no way round the gory details when teaching sword play. I forget this until new students come to class and I start to talk about the 'whys'.
So much of why you do what you do, especially the way you hold the weapon and the way it moves in space comes down to blade and handle design and how that 'interacts' with human anatomy.
The targets that you aim for, the cut angles, the blade angles, the retraction and recycle possibilities all involve explanations of blood, bone and guts, and this leads seamlessly to the reasons for evasion, body angle, and footwork (which by this point have become self evident to all that are paying attention .....) and thus the reason you do what you do.
I guess it's a good test of character to see how those new to the idea take in all the squishy information ...