Everyone in the world has needs for sex and romance. Some people have their needs unfulfilled or repressed, and they suffer for it.
Sex is one of the most basic biological needs, and romantic intimacy (which is a part of good sex) is crucial for happiness, especially for a deeply social species like humans.
Don't you think you're simplifying it a bit? Some people get along fine without having sex, you seem to suggest that anyone who doesn't have sex is bound to be unhappy and lead a horrible life.
While for most people sex is important, I think you need to take a step back and look at how different people's needs can be.
Seriously? Not everyone in the world is a sex addict. He's living his own life. He'll look for what he needs when he needs it.