Well yes, looks DO matter in a relationship... anyone who says otherwise doesn't have an attractive mate... the inner reason for this is biological... for women, this is what each attribute says about her...
good skin/hair- healthy and well-kept
good hips/body- good for child birth
good breasts- good for breast-feeding
so everyone, there IS a method behind the madness
This works the same way with guys...
young/muscular- good protection for family
rich- same thing
big penis- strong sperm, reproduce well
these are just some physical attributes that trigger biological responses from the oppositte sex of attraction to mate... to want to SPEND TIME with someone requires a completely different set of qualities, hence the good sense of humor, smart, etc. Guys have a biological urge to have sex with many women, to "sow their oats" so to speak, because when inside the Vagina, sperm from different men will fight, and the stronger/better sperm will when, making the baby smarter/stronger/etc which is evolution...