There is nothing wrong with sexual intercourse. These terms like virginity have deeper spiritual notions that sometimes we have to meditate upon to attain deeper understanding. However extreme promiscuity is frowned upon in my opinion because it means you are placing yourself as easily...
I think it has been corrected already, this was an old error im seeing now. And I think it was JG blietzkrieg who said 6 was of virginity aswell in the past adding to my confusion.