Master Samael Aun Weor, from his book, “Kundalini Yoga”

 23.     If human beings ejaculate their semen, then, as electric batteries, they discharge themselves and totally fail in the Great Work of the Father.

24.     The refrained desire causes the transmutation of the seminal liquor into Christic energy that raises through the nadis Ida and Pingala.

25.     The Yogi/Yogini withdraws from their spouse before the spasm or orgasm to avoid the seminal ejaculation.