If she rubs her clit, encourage it.
Some fellas see her rubbing herself as a sign that they aren't performing as well as they should be.
But in my opinion, that's rarely why she rubs her clit during sex. It's usually because she's enjoying things and wants things to be even better. (In a good way)
I mean, if she does this every single time you have sex, for extended periods of time, then maybe you do suck at sex. But if it's just every now and then, encourage her to do it.
This will boost her sexual confidence too.

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