Original post by 41b
And they also create happiness, improve concentration, increases maternal behaviour, mediates (permits or allows, I think) bonding, may decrease anxiety, reduces PMS and depression, and so on. This one is good too: "Serotonin: increases sperm motility. It also mediates mood, although not much known yet about vaginal absorption. Even if it doesn’t make it to the brain, it may indirectly alter behavior and emotions by contributing the building blocks of serotonin." Melatonin, which improves sleep, Tyrosine, "Tyrosine: a precursor of neurotransmitters such as dopamine, the hormone of reward and addiction, and norepinephrine, involved in attention and arousal."
These are really powerful effects. They make a woman feel really good, if the sperm is healthy enough to provide them in quantity. Surely, you should think, the memory of a good feeling with many, many other men is enough of a distraction during times of pain and suffering in a relationship, sufficient to promote relationship abandonment or marriage collapse/failure? And it is true we tend to remember the good times, rather than the bad times, or even value the good more than the bad. Do you not think this would promote marriage failure?