From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
In nadsat, breasts are called "groodies." All the girls and women (other than the ten-year-olds) have them. They seem to make the boys wild with desire. Well, at least this is true for Alex, since he's the only source we have, and he does talk incessantly about them hanging out of every woman's shirt, and their pink nipples waving hello at him, he is thereby caused to have the urge to do the old in-out-in-out. So, they very obviously symbolize femininity and sexuality; and, in Alex's case, a rape-to-come.