  Quantitative hedonism is consistent with monist phenomenalism about pleasure, with ‘intensity’ here understood as ‘felt intensity’. It is also consistent with pluralist phenomenalism about pleasure, but only on the assumption that none of the plurality-making features of pleasure also adds non-instrumentally to its value. It is less straightforward to see how to combine quantitative hedonism with those forms of intentionalism that deny that pleasure need have any phenomenal character. Such accounts would need to explain the intensity or strength of pleasure in intentional terms and without making any appeal to felt intensity.