I caught this BBC show a few days ago called Secret of the Sexes. According to the scientific research featured in the show, what attracts a woman in a man is his height. So basically, to attract a woman, a man can stop bothering with going to gym, being successful, or taking a shower on a daily basis ; ). Instead, just be tall - that'll take care of everything.
And for a woman to attract a man, do have small waist to hip ratio. According to the show, although boob size and face are important, men typically notice the WTH ratio foremost.
And, this music vedio of Shakiro's "Hips don't lie" sort of echos the theory.
So what you think? ; )