This is my opinion.
To self-ejaculate out of non-necessity is definitely harmful and looses vital spiritual, intellectual, and physical energy. Years of evolutionary development can be gained by preserving seed. Preservation of the seed has been prized in many spiritual traditions as the secret to eternal youth. However, there are times when self-ejaculation is beneficial in order to avoid vices and also to release pent up energy. This is only true of beginners on the spiritual path who are not yet proficient in transmuting the sexual energy into spiritual energy. The vast majority of spiritual practitioners are still beginners. Anyone who is in this category has the moral right to ejaculate when they feel that they must do so. There is no need to fight against it. In fact, it is impossible to directly fight against and at this level it is nearly a biological necessity to have a release once a week. The benefit is that the focus can get off of that struggle and onto more productive spiritual things. But we should hurry on down the path where there is liberation from the constraints of the body.
What do you think about this?