I absolutely agree, except to add this. While sex and the things leading up to sex make you feel good, the consequence may not be happiness... There's a reason the next day often includes the "walk of shame." While there have been movies and other points made about changing the meaning, by and large everyone, even in those movies and discussions acknowledges that they still feel ashamed.

In relationships, there may not be the walk of shame, but does going down this pathway really mean more happiness, or is it more heartbreak?

I love the idea that happiness isn't the purpose of life.