It has been said that sexiness is not a matter of looks. I would agree with that. I tend to fuck women who are in shape. Some of them are great. Some of them are only into themselves. Still others are simply dead fucks.
To me, however, being sexy is an attitude. Take the lady in this video. I found it while digging through some lost files (disclaimer: I don't know this lady. She never sent me the video. I found it on some site way back when). This lovely lady does not have your typical supermodel or fitness model body. However, there's just something about her. Maybe it's the look she gives the camera as she unbuttons her sweater. Maybe it's the way she bites her lip. Maybe it's the way she flips her head back as she touches herself. Maybe it's a combination of all 3. Who knows? I just know that whatever it is, it works.