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Here, we test hypotheses about psychological systems that may have evolved to process distinct cues in the female lumbar region. The Fetal Load Hypothesis proposes a male preference for a morphological cue: lumbar curvature. The Lordosis Detection Hypothesis posits context-dependent male attraction to a movement: lordosis behavior. In two studies (Study 1 N: 102, Study 2 N: 231), we presented men with animated female characters that varied in their lumbar curvature and back arching (i.e., lordosis behavior). Irrespective of mating context, men\u2019s attraction increased as lumbar curvature approached the hypothesized optimum. By contrast, men experienced greater attraction to lordosis behavior in short-term than long-term mating contexts. These findings support both the Lordosis Detection and Fetal Load Hypotheses. Discussion focuses on the meaning of human lordosis and the importance of dynamic stimuli in attractiveness research.<\/jats:p>","DOI":"10.1177\/01461672221115218","type":"journal-article","created":{"date-parts":[[2022,12,3]],"date-time":"2022-12-03T00:42:03Z","timestamp":1670028123000},"page":"466-478","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Lordosis in Humans"],"prefix":"10.1177","volume":"50","author":[{"given":"Ayten Yesim","family":"Semchenko","sequence":"first","affiliation":[{"name":"Charles University, Prague, Czechia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zeynep","family":"Senveli","sequence":"additional","affiliation":[{"name":"Boston University, MA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitchell R. 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