Abstract
The Post-Coital Time Interval (PCTI) may be particularly important for pair-bonding and establishing relationship commitment. Women have greater incentives for establishing relationship commitment than men because of their greater necessary investment in offspring and the benefits of long-term paternal investment. Thus, sex differences in PCTI experiences may emerge based on sex differences in reproductive strategies. We generated 16 items to assess PCTI experiences and extracted three factors related to: 1) satisfaction and bonding, 2) a desire for more signals of bonding and commitment from one’s partner, and 3) romantic partners having a greater interest in talking about relationship issues. Consistent with our predictions, women’s satisfaction with PCTI experiences was inversely related to the extent to which they desired greater bonding and commitment signals from their partner, whereas men’s satisfaction with PCTI experiences was inversely related to the extent to which their partners’ had greater interests in talking about relationship issues. These dimensions were also related to other indicators of reproductive strategies, including attachment style.
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