Sexy to me is so hard to define. Personally, I think that any form of intentionally controlled movement can be sexy, whether its done on a pole or in Swan Lake, as long as there is some emotion being communicated by the person doing the movement. For that matter, I think that being fully absorbed in any activity and fully present in the moment and in one's body is remarkably sexy, whether it is a dance, the delivery of a lecture, the writing of a letter, or anything else. The look in a person's eyes that a point needs to be made and that there is an experience (even if thinly disguised) of enjoyment in making the point is something that can intrigue and sexually excite me, regardless of whether the point is being made through a dance performance, an instrumental or vocal performance, a lecture or slam poetry recital, or even the simple composition of one's outfit for the day. This is similar to something I think pole_twista said about a guy being absorbed in something he loves.
In terms of physique, haha, I have a type for sure, but I am not rigid about adhering to it. Being physically fit is an absolute requirement for my dating preference. I prefer dark and straight hair, dark eyes, and muscles that protrude at least slightly more than my own but these preferences are more flexible. I generally prefer that a romantic interest of any kind be wider in terms of proportion than myself. I am turned on by raspy voices whether these are spoken in a low range or a high one, and most often I am more likely to be attracted to a guy that is shorter than I am than one that is taller. To me dancing is sexy even if a great deal of dancing skill is not exhibited, as long as it looks natural and fun instead of forced and uncomfortable or technically perfect but inexpressive. And anyone who eats my cooking and acts like they like it earns major sexy points with me, and gets more points for eating the second meal I cook.
The way touching is done is very important. A balanced approach to touching is unbearably sexy. Tickling or touching too lightly is not even remotely engaging to me, and being handled roughly is actually something I find quite revolting. But there is a middle place that it seems like not very many people can (or are willing to) find and it drives me crazy when a guy can.
Lastly in terms of pole dancing, to me sexy is mostly in the attitude. Being enticing without being suggestive I think can be really wonderful. But to me, even more sexy, is what I was mentioning earlier; full presence in body and expressiveness of (any) emotion through movement. I personally can't always do that on the pole although I can pretty consistently get there if I am out dancing at a night club and I like the music that is being played. And unfortunately I can't get there alone with a camera when I'm on the pole at all for the most part ๐จ but I can do it with a live audience fine. Isn't that wierd?