Applying this rule of cultivating an external clitoral orgasm before penetration has the added benefit of increasing the amount of time a couple spends in intimacy. Statistically a woman is much more likely to orgasm with longer foreplay including both oral sex and manual stimulation and the subsequent intercourse is generally more pleasurable and painless.
I have been talking about this idea for a long time as I have had similar questions from many of my customers who wonder about pain with intimacy even after application of lubricant. I always ask them if they were ready to be penetrated when they had sex. If you are not really ready to have someone enter you, even the best lubricant in the world may help, but will not prepare you for the deepest connection you share with someone. That requires some work and letting go inside.
Taking the time to discover and cultivate your own pleasure before penetration is my way of thinking of love hygiene. It also works to even the timing out for many couples. I think it may have been in France when I learned of this technique in the context of a conversation about the difference between French and American men.
I was told, “In America the men say to each other: how far did you get. In France, the men say: how long did she scream…” Go figure.