From my (possibly unfeminist) perspective, I can imagine a man being a "boorish charmer" but not a woman. women can often be attracted to someone who is a "rascal, scoundrel, raffish, devil-may-care, heartless" , all negative terms in some sense, but which imply a disrespect for convention and therefore an exciting sense of danger and adventure. "Boorish" has connotations of bad manners and rough conduct, but combined with "charmer" moves into the category of DELIBERATE intent to impress, therefore implying that the boorishness is a superficial affectation rather than an innate quality.