Altruism is a sexually selected trait that signals a man’s competence as a potential partner and parent. The study found that women judged a man as more desirable for a long-term relationship - but not for a one night stand - when he was seen giving a considerable donation to a homeless man.
https://ift.tt/3idrb8f via /r/science https://ift.tt/3i8oMvn
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