There’s a reason why breaking up from a sexual relationship is much more emotionally painful and much harder to forget than one that didn’t involve sex. There are several neurochemical processes that occur during sex, which are the “glue” to human bonding.
Sex is a powerful brain stimulant. When someone is involved sexually, it makes him or her want to repeat that act. Their brain produces lots of dopamine—a powerful chemical, which is compared to heroin on the brain. Dopamine is your internal pleasure/reward system. When dopamine is involved, it changes how we remember.
The other part is oxytocin, which is designed to mainly help us forget what is painful. Oxytocin is a hormone produced primarily in women’s bodies. When a woman has a child and she is breastfeeding, she produces lots of oxytocin, which bonds her to her child. For this reason, mothers will die for their child, because they’ve become emotionally bonded due to the oxytocin that is released when they’re skin-to-skin with their child.
The same phenomenon occurs when a woman is intimate with a man. Oxytocin is released, and this makes her bond to him emotionally. Have you wondered sometimes why a woman will stay with a man who’s abusing her? We know now that it’s because she bonded to him emotionally because of the oxytocin released during sex.