Scientific fact that a brooding man will want the best host for his offspring primarily looking for strong legs and hips, and a strong back (don't be dirty) this is all due to the man subconciously analyzing how strong the woman is during pregnancy and childbirth, big tits don't garentee that by anymeans if the woman is weak. A weak woman may not survive the birth, and thus the child may not. So a 'real' man (as in a male who is subconciously willing to create offspring [which is what we are made to do thus 'real man']) prefers automatically a more sturdy boned girl and tits don't help OR hinder in child birth, or any child raising process really.. in the wild if a mother can't feed, there would be another mother who still could like monkeys etc.
Plus they may have a bad back because of it [tits] and are no longer able to clean the tub.
Obviously when looking for a partner, a real one, we look for more than just boobs. I myself truely look at personality as #1, and sometimes don't even care that much about looks. However there is nothing wrong with being the normal stereotypical male and being attracted to a young blonde with a nice rack once in a while.