| Good question.
 I myself am a 'boob man' so I can assure you that I appreciate breasts (not to objectify women).
 As to whether or not it is genetic or sociological - this has been debated for years. Desmon Morris would tell you it is genetic, however, I would tend to argue that there is a synergy between nature and nurture.
 
				__________________-- apt-get install spare_time --
 |