[youtube]
http://www.youtube.com/watch?v=KKMdtxKkdPU[/youtube]
looks are subjective from girl to girl, also girls change their preference between a more masculine look to a more femanine look depending on your cycle (so you can't really trust what she is saying), and are more likely to be looking for sex during the masculine look phase of their cycle, where as more prone to want a long term relationship during the femanine look phase of the cycle, but it is just a preference that was noted not an absolute, so think of what you want, what she says is not really that important, but if you are more geared towards the pretty boy skinny modelesk type guy, then naturally the physical preference will be suited towards keeping guys around (possible long term sex but she will be more likely to hold out), or if you want to be more suited to girls giving it up faster and being in a more physical relationship that doesn't tend to last as long, then the physical preference that would support your goals is a muscular masculin body, but you can achieve either ends by either means, it has just been studied and the preference has been observed to be different during the different phases of ovulation
also not too many girls prefer super skinny or fat (but some still do), so at least try to maintain fitness, there are extremes to everything though and if you get way to big (160-180 is not too big, you are kidding yourself if you think that is big), it can be unattractive to alot of girls, but will appeal to a certain neiche of women who have a fetish for hulks, if you're 250 lb lean you will find most girls find you gross, but the ones that are into it, are fucking way into it