I stopped reading that article once they based everything on the premise that women having orgasms are rare and hard to do. That is because they don't know what they're doing, and repeating the same shyt that the people before them did who also had no clue what they were doing.
I have a theory the reason why both sexes have orgasms is to keep the nerves of the body healthy, and working. When your nerves go, you are soon going to die due to weak nerves. Orgasms work deeper parts of our nerves that exercise or any other type of stimulation can't. Orgasms are basically exercise for our nerves, and also helps keep the organs in our pelvic area strong.