I don't know if I believe that orgasms cause a loss of love or desire in relationships. Cause it's not like orgasms with partners are the only ways that people orgasm. I have had thousands of orgasms in my life, the vast majority of them given to myself. I don't feel a "low" after I orgasm either. Sure masturbating too much can cause a dulling of sensation for a while, which if you abstain or edge for a while can come back to normal. But I don't find that orgasm makes me enjoy masturbation less or enjoy life less for that matter. So why would it for orgasms with my partner?

To be fair, pleasure during sex for me is different from masturbation anyway, it's like continual waves of pleasure through my body starting in the pelvis, and happens as long as I'm being fucked. I don't know if I've ever had a penetrative orgasm yet or not. But I enjoy penetrative sex more than masturbation even whether I orgasm or not. But I still love masturbation orgasms too. All pleasure is good pleasure. 😊

Tantra or bonding sex sounds great though!