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The Progression Bias in Casual Sex
Women are more likely to have orgasms with partners that they've had sex with multiple times than someone they're having sex with for the first time, which is not usually true for men. Iris: There might be a bit of an evolutionary motive behind this. She says people start relationships thinking that it's kind of like buying a phone, or if you don't like it, you will easily take it back to the store. But our feelings for people, we think it doesn't quite work that way.