Found this article in Goggle :)
The definition of sexy varies greatly from person to person, but most people would agree that there are some common qualities in a "sexy" person. For this sexy test, three attributes have been chose to define sexiness: image, confidence, and attitude.
Image: A person who is sexy would have a high self-image, and others would view them as having so. Face it, someone who doesn't groom, brush their teeth, use underarm deodorant, etc... would not be very sexy to most people.
Confidence: Simply stated, someone who is sexy needs to be confident. They have to believe in what they are doing. Someone with no confidence in himself or herself allows themselves to be easily abused by others, which is not sexy.
Attitude: Someone sexy, in a sense, also has a good outlook on life. They can also take some helpful criticism and get something out of it. No one wants to be around a negative person.