This basic wisdom sounds like a child's view of human relationships and emotions. Like someone approximating what things should be like rather than what they actually are.

It honestly just reads like misogyny, like women who have many partners are emotionally incapable of love. Let me tell you a secret, any semi-attractive & social woman will have easily had 20 partners by age 25-30.

Theres no such thing as the "same exact" pair bond 20 times. Each one is different. And if something is of a certain strength, then how can it be weaker because it happened before? The only way what you're saying is true is if the person was jaded by the previous relationships and can no longer form deep connections.

Emotions are infinite.