The answer to the question depends on many factors, but I'll try my best to cover a few...Firstly, for women. If you are a woman, then the answer is generally that an ejaculation will not impact cultivation practice. In fact, the ecstasy and bliss is helpful for cultivating that real juicy "happy" feeling I talk about. After all, have a look at the ecstasy of Saint Teresa. What does it remind you of?