Jerking off gives me a "positive emotion," as it feels good. It does not, however, add any lasting value to my life. That's because the only long-running positive emotion is that of satisfaction, which depends on one's world view, a sense of achievement, a sense of self-respect, a sense of functionality in family, and so on.
If you want to argue that satisfaction is required in order to evaluate one's life as good, I'd agree. If you want to argue that all pleasurable emotions represent good, and all unpleasurable emotions represent bad, then you have a poor understanding of how the human animal functions.
If you want to argue that satisfaction is required in order to evaluate one's life as good, I'd agree. If you want to argue that all pleasurable emotions represent good, and all unpleasurable emotions represent bad, then you have a poor understanding of how the human animal functions.