What is sexy? While we as a couple certainly have different likes and dislikes and find different things key points of attractiveness, we definitely seem to agree on sexy.
Attractiveness is easy for us. Hubby is a sucker for beautiful eyes and smile on a lady. Wife is more into chests on men and a really nice butt on a woman. But these points are not what we see as making a person sexy.
Sexy people can have any looks, it is their actions and bearing that make them sexy. When we talk about someone being sexy we are talking about their personality. Further, no specific number of traits can be assigned to this or defined.
Sexy is like a fire inside a person you can see, or at least the smoldering smoke. Sexiness can be a shy person who simply gives you a little smirk and twinkle of the eye while avoiding you, the "I am interested in you but shy" person and you see there is something smoldering; someone who gives no clues to their interest is not very sexy, as the fire is hidden from us and not even smoke is to be seen. A more outgoing person may be sexy because they will sit and chat with you all the time using their body language in a way that lets you know they desire you. Still more outgoing people will be confident in their touch; flirty, but with a purpose that cannot be mistaken but tends to shy just a little bit away from those special areas, they mean to follow up on it sometime - not just a tease, a small fire with lots of fuel ready to burn bright. Some teasers can be the same way, but tend to be less serious in their manner about it, yet fully intend to follow through. Teasers that do not follow through are not really sexy, they are just teasers. Finally we have the really outgoing ones, they not only talk sexy but they tend to be very into contact with those special parts of your body constantly while not being overbearing about it or completely slutty - watch out... the fire is about to flashover.
Sexy is also knowing what you want, and what others want. Someone that is not very sexy in public can be drop-dead sexy in the bedroom because they love to please and be pleased - not to fill some void in their personality, but for the pleasure itself and the desire to share it.
This is a pic in my corset dress (yes, a whole dress that is a real corset!). While wearing it is somewhat revealing, even with nude colored covering underneath to prevent my nether regions from getting ticketed by the police, it is the way I walk and move and respond to the looks that makes it sexy, and it is certainly not my figure that does so, as I am a bit overweight. Wearing this dress through St. Johns Square Markets in Dublin was fun, and with all the looks I just returned the most sexy I could... "I am getting lots of good sex tonite, and I love an audience". Even the picture I think is sexy, as it hints at what is coming later... when I let my boobs pop out.
In conclusion, sexy is not a perfect Barbie or Ken figure, that is attractive. Sexy is what is inside, and how you let it show.