This is the most immature and narcissistic comment I've read in a long time. I think you absolutely don't get what a relationship is about. Having a best friend as partner who is always around. Having kids that give a whole new meaning to live. Just mating with the next best babe will give you no long term satisfaction. What you describe here sounds more like an addiction.
Fewer people are marrying, at later and later ages, and divorce rates are still very high. Every rich country, it seems, is below replacement rate when it comes to having kids.