Anhedonia

In psychology, anhedonia (< Greek αν- an-, without + ηδονή hēdonē, pleasure ) is not being able to feel pleasure. This may include things like eating, exercise, watching movies, meeting friends, social activities, or sexual interaction and activity.

In most cases, anhedonia is caused by mental disorders. It happens in some severe cases of depression and it is quite a common symptom of schizophrenia.

Other websites

• No Pleasure, No Reward
• Discussion of male orgasmic dysfunction (ejaculation without orgasm) on the Sexual Health Forums of HisandHerHealth.com