I have done it several times, and there is more running water.

Sex is normal for both men and women, more or less related to everyone's gland secretion stress response. Women are also related to sexual foreplay's adjustment, which is harmless. It will make sex more lubricated. There is no special rule on how many times to do it. As long as you don't feel tired after doing it, both men and women should follow this principle. Sex is a very pleasant thing, but you must have a fixed sexual partner and pay attention to sexual hygiene. I hope you can have a high quality life.