Facial expressions during orgasim

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Distinct facial expressions represent pain and pleasure across cultures

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9 Candid confessions about the faces we make during sex | The Times of India

Background: We systematically reviewed the literature to determine the influence of sex hormones on facial emotion processing FEP in healthy women at different phases of life. Results: Despite the limited number of studies in some categories and the existence of inconsistencies in the results of interest, the findings of the review suggest that FEP may be enhanced during the follicular phase. Studies with women taking oral contraceptives showed reduced recognition accuracy and decreased responsiveness of different brain structures during FEP tasks. Studies with pregnant women and women in the postpartum showed that hormonal changes are associated with alterations in FEP and in brain functioning that could indicate the existence of a hypervigilant state in new and future mothers. Exogenous administration of testosterone enhanced the recognition of threatening facial expressions and the activation of brain structures involved in the processing of emotional stimuli. Conclusions: We conclude that sex hormones affect FEP in women, which may have an impact in adaptive processes of the species and in the onset of mood symptoms associated with the premenstrual syndrome. Behavioral research has strengthened the view that sex hormones are involved not only in reproductive behavior or sexual dimorphism, but play an important role in different cognitive and emotional processes, in non-verbal behavior and in the functioning of a number of brain structures Maki et al.
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Scientists reveal how facial expressions during ORGASMS vary across different cultures

Real-world studies show that the facial expressions produced during pain and orgasm-two different and intense affective experiences-are virtually indistinguishable. However, this finding is counterintuitive, because facial expressions are widely considered to be a powerful tool for social interaction. Consequently, debate continues as to whether the facial expressions of these extreme positive and negative affective states serve a communicative function. Here, we address this debate from a novel angle by modeling the mental representations of dynamic facial expressions of pain and orgasm in 40 observers in each of two cultures Western, East Asian using a data-driven method. Using a complementary approach of machine learning, an information-theoretic analysis, and a human perceptual discrimination task, we show that mental representations of pain and orgasm are physically and perceptually distinct in each culture.
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If your partner flashed a big grin while orgasming, what would you do? As a Westerner with years of societal biases from movies, television, and porn telling me what an acceptable O-face looks like, I would definitely find it at least a little odd. Their findings are published in PNAS this month. Carlos Crivelli, an author on the study and lecturer in psychology at De Montfort University in Leicester, told me in an email that the starting point of their research hinged on a question: Do we all agree on what different facial expressions mean? The team of researchers compared available observational data on facial expressions across cultures with new data from human perception experiments in the lab.
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