Does "Body Count" Really Matter?

With the loosening of social mores and a broader acceptance of casual physical intimacy, especially in younger adults, it's not a surprise that these relatively new worlds and opinions may collide with more "traditional" monogamous people. When those with "high body counts" try to enter into the world of strict monogamy, they are sometimes outright rejected because of their past behavior... and this hurts feelings! Is a high body count indicative of mental issues? Compulsive/impulsive tendencies? Does it have zero effect on their ability to maintain a marriage to one person for life?