The Beauty of Fertility and a Good Immune System • Preference for younger features on female • Preference for masculine men (testosterone-related facial features) for casual sexual encounter, less masculine men for long-term partner • Smell preference for an immune system different from our own (dissimilar MHC genes)
Beautiful Female Faces Are Symmetrical and Youthful
Smell & Attraction Sweaty T-Shirt Re-enactment
A tale of two rodents… Prairie voles are monogamous and nurturing. Mountain (Montane) voles are promiscuous and not nurturing. Only ~5% of all mammals are monogamous
A4w--HP7tc Oxytocin Receptors and Pair Bonding
PL PFC NACC Density of Oxytocin Receptors Effect of Oxytocin Antagonist on Partner Preference Social Chamber
Hormones and Mating Strategy Oxytocin : neurohormone secreted during child birth, lactation; promotes pair-bonding • Expressed more by females • Released during orgasm by both sexes Vasopressin : neurohormone important for social behavior, sexual motivation and pair- bonding • Expressed more by males OT OT VP
This is your brain on Love… Dopamine up: more pleasure and motivation, less sadness Oxytocin up: more trust and attachment, less fear Vasopressin up: more arousal, attraction, less anxiety Serotonin down: more obsession and
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- Fall '19
- Sex organ