Remember back in school, when you would blurt out a fact you learned online and some smarmy-ass adult would respond with, "Don't believe everything you hear on the internet"? OK, so maybe the average person doesn't swallow up to seven spiders a year, but -- for the most part -- we do take a large chunk of what we read on the internet as fact.
This chunk consists of studies, personal essays, and surveys taken at face value, which are then aggregated by your favorite websites and spread by your friends and family all over social media. In some cases, these articles can be true... but when it comes to sex, a lot of what you're reading warrants some serious skepticism.
Surveys aren't always indicative of real trends
As a writer who specializes in sex and dating, I know how much pressure there is to put out articles that will get eyeballs on them. Thus, you need to write headlines that will be clicked on. Anyone writing for online publications these days is guilty of using clickbait. So I can't totally condemn any of the writers or publications mentioned.