I don't get how come the vast majority are virgins. lol. unless a lot of people on this site are under 20.
I would say that probably, INFJs require more emotional intimacy than other types and are not as likely to totally whore themselves out like some of the "E" types we all know.
About the 20+.... I have heard of a lot of people who exceed 20. One who was at 100. But if it's at 1000, they are either a rock star who banged every groupie that came his way, a porn star, or some kind of thing like that, would be my opinion.
Once I saw a show about a porn star in which the porn star said she had slept with 3200 people. And I am thinking... how can you not have a disease after sleeping with 3200 people. ????