I guess I don't get it. I haven't noticed anything unique about condom use on an intact penis? We used them, didn't seem like anything special. Although I haven't had sex with a condom in years so maybe I'm forgetting something? I don't know, I think that it just isn't that complicated. I don't remind my dd if she is washing the folds of her vulva so I'm not getting why parents would feel the need to make sure their sons are washing under the foreskin?
My point? Not everyone figures these things out on their own! I am sure I had a yeast infection or two that were caused by not being clean down there (who knows!), I also didn't smell that great down there, but wasn't sexually active so it was never an issue. I wish someone had normalized cleaning every part of my body. Behind your ears, under your arms, your vulva folds, foreskin, whatever.