Masochism

That the ascetic ideal has meant so many things to man...is an expression of the basic fact of the human will, its horror vacui: it needs a goal - and it will rather will nothingness than not will.

There is no necessary antithesis between chastity and sensuality; every good marriage, every genuine love affair, transcends this antithesis.
But even in those cases in which this antithesis between chastity and sensuality really exists, there is fortunately no need for it to be a tragic antithesis. At least this holds good for all those well-constituted, joyful mortals who are far from regarding their unstable equilibrium between "animal and angel" as necessarily an argument against existence - the subtlest and brightest among them have even found in it, like Goethe and Hafiz, one more stimulus to life. It is precisely such "contradictions" that seduce one to existence,

Friedrich Nietzsche, On the Genealogy of Morals