I don't think there is any way to become "sexy." the way I see it is sexy is in the eyes of the beholder. I do how ever think that your director sounds kinda perverted.
Don't know if this helps just my two cents on the topic at hand.

Sexy is very subjective, but basically "being sexy" is communicating visually that you are ready to hop in the sack with whomever is viewing you. It's creating the illusion that you are all about mating.

Sexy is different for different people, but overall, it's about looking like you are ready, willing, and able to "get down" at the drop of a hat.

but overall, it's about looking like you are ready, willing, and able to "get down" at the drop of a hat.

I disagree. I think that's looking whorish.

Looking sexy isn't necessarily about looking ready and willing so much as just having an alluring appearance that might make someone curious about you sexually. Maybe you'd never sleep with them in a million years and they know that, but the way you look makes them want to imagine what it would be like anyway.

I do agree that it's different to different people.

I think healthy, glistening skin, a fresh face, and clothing that highlights your curves would be considered pretty much universally sexy. Kind of a display of youth and vitality with a touch of naughty mysteriousness.

Then again, I'm a chick, so what do I know?

http://www.youtube.com/watch?v=zQEBobE9XZs

Well, I didn't say ready, willing and able to get down with whom.

oops, that link was a screw up, sorry.