The three b's is a food name 200 years ago in the west that is beans beef and bacon that people cooked and ate for dinner (this was in the middle of nowhere where they had this meal).
I appreciate "the three B's" of feminine desirability as much as the next dude, but there's really not all that much going for those attributes if the chick doesn't also have a nice personality --- a kind heart is what I look for most in a lady.