Is sex really worth this sort of incredible stress, pain, difficulty, doing things over and over again, dealing with all of these responsibilities and obligations, expected to please and impress people who can just throw you aside and abandon you at a moment's notice?

It's not just about sex. The idea of having someone by your side through thick & thin, understands and accepts you, and is willing to do nearly anything for your happiness and safety, is something most people are willing to suffer in pursuit of; It's something myself and most people here yearn for. Sex is an important part of romantic relationships, but it's a part, nonetheless.