>>82129625 (OP)
I call it the No-face, as opposed to an O-face when she's really into it
I actually prefer it, makes me wanna try harder to get some sort of reaction from her
I agree with all of you, but I think it can be a bad sign in a relationship if she has this face even when ovulating and horny. Some women aren't really expressive or noisemakers though. IIRC, many women are mostly silent when masturbating.
>>82129772
I think it's cute desu I keep a straight face a lot and I had to be a stealth fapper in my childhood as well so I don't make noise when I'm cooming.