Hi Leil,
Please allow me to clarify.
As we all know, the 'net is replete with myths, urban legends, fake news, propaganda, and all manner of info that isn't true. For the most part, who cares? However, when info is about health, posters are obligated to support what they're posting as factual by posting links of scientific proof like I did about the very real dangers of breaks in skin. We don't have to watch "Monsters Inside Me" to know that various opportunistic pathogens and parasites seize advantages to invade hosts.
As to masturbation, we have all been exposed to myths and urban legends. In contrast, I have yet to be exposed to any scientific research that has indicated that masturbation, male and female, present any medical risks.
My fiancee and I established open and candid sexual conversations very early in our dating relationship. One of of her first personal revelations was that she has always loved sex, and she, in essence, craved euphoric sex. She had assured that I knew that to her, euphoric sex was better than any drug. About a week later, she brought up mutual masturbation. By the way she said what she said, she obviously had a lot of experience with mutual masturbation. She had previously told me that while she was extremely sexually active when she was in college, she went off the pill because it caused her to gain weight. Hence, my inference was mutual masturbation was for her and her sex partners a birth control method. She did add that almost always mutual masturbation would end with her getting herself off and her boyfriends' dicks inside of her mouth ;-)
My fiancee told me she has masturbated just about every day since puberty. She's masturbated before dates that she knew would end in sex, and after sex. She is well aware of euphoria created by chemicals released by her brain during orgasm. She has told me that orgasms cause her to become more horny. She assured me that there were no known harmful consequences from masturbation. The confidence with which she assured me of no known medical consequences associated with masturbation appeared to have been based upon scientific research to which she was privy.
My fiancee knows she can sexually stimulate me by masturbating in front of me. I love watching her masturbate, with her fingers and with her various sex toys. I have many videos of her masturbating.
Masturbation is a personal decision. However, people should know medical facts as opposed to opinions, beliefs, myths, urban legends, etc so that they can make informed decisions about their private desires.
I have no horse in this race. I do not care who does and doesn't masturbate. However, I do believe that social decorum requires that posters who desire that their posts be interpreted as factual post links to scientific research that support their info, especially on a sex forum where consequences of bad advice can become catastrophic.