Even though it may have been made as a lighthearted gesture, I think that the last post by JohnInKansas has also made a significant point regarding why it is that men sometimes respond as they do to this particular portion of the female anatomy. We are destined to connect with/to that part of a woman immediately after we are birthed. It is that part of a woman's body that we have a real tactile relationship with, for months and in some cases, for several years afterward. As infants, we are dependent upon being fed in this manner. Even if we are not breast fed, but rather bottle fed some kind of formula, the position that a woman will hold her infant, while doing so, still places us in very close proximity to her breast. The kind of bond that is created by a mother breastfeeding or even bottle feeding her child is something that we carry with us all of our lives. It's a primal thing. Couple all of that with the mating urges that accompany sexual maturity and hormones coursing wildly though the veins of those discovering members of the opposite sex for the first time, and add a few chemical, herbal or liquid recreational imbibements and it's enough to make some loose any sense of proper behavior and revert to a more primitive state.