The kidneys, organs with several functions, serve essential regulatory roles in most animals. It is generally accepted that the kidney plays an important role in the male ejaculation, but I think the kidney does the same function in female ejaculation.
If a man has ejaculated several times a night, he might get some symptoms the next day include lower back pain, frequency of urination, slowing of the urinary stream, dysuria and sexual dysfunction. Medical experts will tell you by far the most common cause of your symptoms would be prostatitis, an inflammation of the prostate gland.
But I want to say loudly here, I do not agree with this diagnosis. I am a woman and should not have prostate, but I also have these symptoms like lower back pain, frequency of urination, slowing of the urinary stream, dysuria and sexual dysfunction after I ejaculate so many times in a short time. For example this was what I really experienced, once I was 24 years old and saw American TV, I was very very moved by the kiss between the main couple in the show, but U.S. TV broadcasted an episode one week, and I need to wait to the next week to see what they done after the kiss. In that waiting week, I was so obsessed with that kiss, and every night I would masturbate 4 times, until past that week I had ejaculated 28 times. As the result I suffered a deserved punishment after I had done the crazy movement. I got lower back pain and frequency of urination very serious and also felt very pain in my labia majora. I didn’t know why, I just can touch something in my labia majora. I almost had to go to toilet 30 times day and night, and every time I was so urge to urinate, but little comes out. In that week, I didn’t ejaculate any more. I thought I was sick, but the week over, I recovered back.
I'm sure there must be some secret about female orgasm not solved yet, but unfortunately, no one believed what I said.