Happy to hear from you. No worry about butting in. I can't see you butted in any more than Dante did. You're making a much better contribution to the discussion than he is.

hands-on demos are essential to the 'instruction'

Remember where this discussion started. It was with:

Do you not think many of those sordid outcomes could be prevented

We weren't talking about learning about sex for the purposes of pleasure and fun and meaning and all. We were talking about the purpose of preventing sordid outcomes. I don't imagine anyone deciding the sordidness of an outcome depended on whether, say, she was able to tell him just how to give her an orgasm or not.