Breathy voices are seen as sexy and sensual. For this reason they are commonly used by phone sex operators, pornographic actors and actresses, and other individuals attempting to convey sex appeal.
More About Breathy Voice
Women naturally have more breathy voices than men, as the gap at the back of their vocal cords is larger.
One of the most famous examples of a breathy voice was that used by Marilyn Monroe to sing "Happy Birthday" to President Kennedy in 1962.