For those of you who are not sure, there is a distinct difference between pleasure and happiness. Pleasure exists in the here and now, for the most part. It consists of those little moments of bliss, such as winning the lottery, typing The End on your first manuscript, and going on a date that ends with many moments of pleasure over an extended period.
But these moments are transitional and do not in themselves constitute total happiness. They contribute to it, certainly, but happiness depends on more than just having a good time between the sheets or winning some cash.