You put too much weight on male domination of women and bloodline and nothing on disease. You don't get syphilis and gonorrhea and the like from virgins.
That's an excellent point; thanks.
It doesn't help explain, however, how a majority of men justified their own "catting around" before marriage, many visiting prostitutes, but still demanding a virgin wife. By the time they marry, they've long since proved that they don't have much regard for their own safety...