Here is a snippet of what I found so interesting in relation to this OP:
Quote:
Oxytocin (Greek, quick birth) is a mammalian hormone that also acts as a neurotransmitter in the brain.
In humans, oxytocin is thought to be released during hugging, touching, and orgasm in both sexes. In the brain, oxytocin is involved in social recognition and bonding, and may be involved in the formation of trust between people[1] and generosity.[2][3]
In women, it is released in large amounts after distension of the cervix and vagina during labor, and after stimulation of the nipples, facilitating birth and breastfeeding, respectively.
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Biology is fascinating!!!