Abstract
This paper argues (i) that the possibility of experiencing at once pleasures and unpleasures does not threaten the contrariety of pleasure and unpleasure. (ii) That the hedonic balance calculated by adding all pleasures and displeasures of a subject at a time yields an abstract result that does not correspond to any new psychological reality. There are no resultant feelings. (iii) That there are nevertheless, in some cases, sentimental fusions: when the co-occurent pleasures and unpleasures do not have any bodily location, and that their intentional object vanishes, they truly fuse with each other, giving rise to sentimental mixtures in which the initial pleasures and unpleasures are no longer discernible.