#1
It's In The DNA!
It turns out that a man's obsession with large breasts isn't as creepy
as some people say. Hey, give them a break! It's just evolution's way of
making sure they find a good mating partner (and have fun finding her).
You do want the human race to survive, don't you?
read more reasons after the cut
#2
Age
Pre-teen girls and women past menopause have one thing in common when it
comes to breasts. They both have little or no firm or full breast
tissue. A woman's bust is a strong indicator of whether or not she's the
right age to have children. You might want to check her ID though
#3
Face to Face
Since humans are one of the very rare animals that have sex
face-to-face, men have had more opportunities to admire a female's
breasts during sex. Over time, breasts became associated with sex
itself. And we all know men love that.

#4
Fat Can Be Sexy
Back when our ancestors lived in caves and had little access to food, a
woman with more fat on her body was more likely to successfully carry
out a pregnancy. She had more energy to pass on to her baby. So women
with more fat reserves became more attractive. And since breasts are
primarily made of fat, and are also a good symbol of the ability to
store fat, they can grab the attention of any old caveman.
#5
Hourglass Figure
No matter where you are in the world there is one thing for certain, men
love a woman with an hourglass figure. This is because women with this
body shape are less likely to get a variety of diseases. And you can't
get that classic curve without the top part of the hourglass.

#6
Western Culture
Men love busty women, sure. But breasts are not loved in the same way
across the world. There are cultural differences. "In some African
cultures, for example, women don't cover their breasts, and men don't
seem to find them so, shall we say, titillating." says anthropologist
Fran Mascia-Lees.
7
Fake-Out
When a woman is at her prime, her most fertile, her breasts will usually
become larger and firmer. So think of large breasts as a natural fake
out. Men will instinctively gravitate towards a voluptuous woman because
she appears to be more fertile.

#8
Motherly Instincts
Professor Larry Young, along with other scientists, argue that when men
pay special attention to a woman's breasts the hormone oxytocin is
released in the woman. Oxytocin is known as the "bonding chemical". It
was widely known that babies released this bonding chemical during
breast feeding, but now we also see that women release it too-- with or
without a baby. The stimulation kicks starts the instinct to begin
mothering an infant. So it's no wonder why a man would naturally be
drawn to this.

#9
Attachment
According to Dr. Helen Fisher, "As men fondle women's breasts oxytocin
is released in her brain, triggering feeling of attachment and focusing
her on his face, smell, voice". This strengthens her desire to bond with
her male partner. In a sense, it's just another way for men to make
themselves more attractive to women.
#10
Help Me Help You
It's not just bonding that goes on when women's breasts are stimulated.
It's also arousal, plain and simple. According to Live Science, "Recent
studies have found that nipple stimulation enhances sexual arousal in
the great majority of women, and it activates the same brain areas as
vaginal and clitoral stimulation." So she's aroused, he's aroused,
everybody's happy. Thanks, boobs!