Why Size Of Breasts Matter...

The new and probably wrong explanation here:

http://www.livescience.com/23500-why-men-love-breasts.html

My own theory:

In ancient times there were much the same clothes for each sexes, and the clothes covered most of their bodies with little difference by the clothes way of hanging downward - except for the breast part for the females. Since nobody cut their hair, this difference was important especially when there were little daylight, like in dense forests and in northern areas. Otherwise the men had difficulties finding the females that would stand out in a crowd - to mate with. Choosing an other man in a hasty time with harsh competition could be devestating (both could easily be killed or seriously injured in a rage when they got furious...)

Evolution forced men to choose the women with bigger breasts to get more offsprings than other men. Naturally selection towards bigger bossoms. Of course the reward were also other benefits that would follow along to better keep the couple together to give the offsprings an edge compared with other offsprings, like the article mention, but the main reason for bigger breasts is probably the important first visually contact between a man and a woman. Love at first glance, you know...