Well, this need to reassurance comes from curiosity, because knowning in general what women think, that will create a standard for me, I didn't ask my loves because it doesn't bother me when she rubs herself while being penetrated, I just wanted to get a broad view of why women do that, that's why I came here.
No, your need for reassurance triggered the action of creating a mask for that insecurity, a mask you call curiosity. Do not trifle with my bullshit meter or I will abandon you. My bullshit meter is sensitive, and accurate. Pretense in the face of wisdom is insulting and pointless.
And you don't listen to the answer that has been repeated to you in every possible way: there can be no standard. Sexual pleasure is highly individualized.
Stop contradicting yourself. Poorly crafted lies in the face of wisdom are insulting. You say you are interested in improved sexual fulfillment for both of you. You are told this can be achieved through asking her instead of strangers. Yet, you do not ask her. You say you don't care that she does it, even though you also say you believe it means your performance is inadequate. You don't care about something you perceive as stemming from your poor performance, but you are interested in mutual fulfillment, all things you say. All contradictory. And yet you're here, to establish a standard, a standard you hope will assuage your fears, rather than simply asking the one woman who knows why your woman is rubbing her clit, which is the only standard by which you can measure whether or not you need to do something different, or whether or not you are doing it just right, and whether or not it even has anything to do with you.
I'll reiterate. There is no standard to establish, and if there were, polling a small, self-selected group of women with no means of scientific control could never establish such a standard. The only important answer is lying in your bed at night, rubbing her clit. She is your standard.
Now, you can lie to yourself all you want, but if you keep lying to me, you'll have to lie better, or I'll grow bored and abandon your questions.