The quote in the parent comment says that the whole hedonic machinery within us is a result of natural selection, of which conscious happiness is just a side effect. Then why not just go ahead and do what that machinery drives you do to: go and have offspring. Chances are that this is the nexus where most happiness can be found.

Wow, that... makes a lot of sense. It's one of those things I already knew intuitively but couldn't formalize why.