Do all men want to be with the prettiest girl they know?

looks are not everything! but I'm asking this because there is one yahoo user who keeps asking about how pretty his gf is. naturally the answers are mixed. from how beautiful is she, to 'girls, would u be jealous of her?', to what makes her exotic?, etc. and the girl has his baby, and he is her fiance. ~ at this stage in life a man is still concerned on that? do all men want to be with the prettiest (and best personality..) girl ? i guess this fascinated me, college girl, interested to know.