This hormone, known famously as the “cuddle” or “love hormone,” is released during touching, orgasm and sexual intercourse; it promotes attachment and trust. It is the same hormone released by the hypothalamus that enables bonding between mother and child. During “love-bombing” and mirroring in the idealization phases with our abusive partners, it’s likely that our bond to them is quite strong as a result of this hormone. Intermittent reinforcement of positive behaviors dispersed throughout the abuse cycle (e.g. gifts, flowers, compliments, sex) ensures that we still release oxytocin even after experiencing incidents of abuse.
I’ve heard from many survivors who reminisce about the great sexual relationship they had with the narcissist, containing an electrifying sexual chemistry they feel unable to achieve with future partners. This is because charming emotional predators such as narcissists are able to mirror our deepest sexual and emotional desires, which leads to a strong sexual bond, which then, of course, releases oxytocin, and promotes even more trust and attachment. Meanwhile, the narcissist, who is usually devoid of empathy and does not form these types of close attachments, is able to move onto his or her next source of supply without much thought or remorse.
The addictive nature of oxytocin is also gendered according to Susan Kuchinskas, author of the book, The Chemistry of Connection: How the Oxytocin Response Can Help You Find Trust, Intimacy and Love. The unfortunate fact is that estrogen promotes the effects of oxytocin bonding whereas testosterone discourages it. This makes it more difficult for females in any type of relationship to detach from the bond as quickly as men.