Questions like this one, particularly when posted late at night by new members, tend to be treated with a lot of suspicion by the regulars around here. (It's this time of night when the trolls come out to play).
However, on the assumption that this is a genuine question:
1. Wear plain colours, with simple lines.
2. Line the camera up with the part of the body which you want to emphasize. (e.g for pouting lips, have the camera at head height. For thrusting hips, have the camera lower down).
3. Ensure that the background is uncluttered, of a contrasting colour to the clothing being worn, and preferably thrown out of focus by selecting a wide lens aperture. (Bold colours for clothing, with a pastel background, are often best).
4. Contrary to Snags (tongue in cheek?) post, use a long focal length on the camera. (i.e. keep the camera well back and zoom in, rather than move the camera close). That will avoid the distortion of features which can occur with a wide angle lens, and make it easier to throw the background out of focus.
5. Simple props can make a basic photograph extra special. A single bright embellishment on a plain dress can make a great deal of difference. For sex appeal, just think of the Cadbury's flake adverts!
Chris