If a man is described as red-blooded, he is considered to be strong and healthy and have a strong interest in sex. Hers is a body which every red-blooded male cannot fail to have noticed. red-blooded male/Englishman/American etc used to emphasize that someone has all of the qualities that a typical man, Englishman etc is supposed to have - used humorously
endowed with or exhibiting great bodily or mental health; "a hearty glow of health"