You don’t need to experience something to know it exists. And even if this were true that ends up being a shitty justification for abusive relationships.
Some do.
Knowing it exists doesn't make it "real", for some, for lack of better phrasing.
And with the rise of video and amateur porn, you can in fact have a easy look what other people are doing and if you are maybe missing something.
Logically, if it was as easy to get promoted or move to a new job as shaking a hand and talking over the bar, people would move around more often.
But because current job ads above minimum wage ones are looking for degrees and multiple calls spread over a few weeks and certain skills/portfolio/hisory, it's a big barrier even before talking about studying the interview specific skills
Meaning: the sex and relationship you have with your first partner is necessarily the best and relationship you've ever had.