I found this picture a while back, but haven't been able to add it to a post yet. So, I'll just do a special post about it...
Normally, when debating the whole breast legal/illegal issue, people post pictures. These pictures typically have an attractive naked female torso, and a really fat guy that kinda has man-boobs. When you're trying to convince people that the breasts are the same, it's a horrible comparison. Any man will think the attractive female has attractive breasts, which supposedly promotes sexual interest. The fat man doesn't stand a chance. Well, the one I found stands a chance...
Take a look at this picture on flickr, and lets debate: What makes the breast illegal?
Is it the size? If so, I'd say this person has a lot of women beat in terms of size, including the size of the nipple. If size were an issue, the laws would specify that breasts cannot be shown if they were a specified size or beyond. This clearly isn't the case, because women with "bee-stings" still get arrested.
Is it the attractiveness? If this were the case, it would be highly subjective. Cover up everything except the breast of the picture above, and ask someone if it appears to be attractive. They'd probably be interested. Attractiveness isn't the case, because women who are very unattractive still get arrested.
Is it because it sometimes secretes liquid? Well, that's a strange reason to ban showing it. More often, that's the primary reason why it is legal to show when nursing an infant. If liquids were the issue, we should arrest anyone who cries in public.
Is it the gender? You bet! Most people who see the above picture would say the legality depends on if it's a man or a woman. Are they offended when they see it? They probably can't answer due to a lack of obvious gender. If they need to think that hard about it, then they probably aren't. It's clearly the size and shape of a typical breast, but would certainly draw mixed emotions from those who oppose only the female breast.
So the laws dealing with breasts have nothing to do with the actual physical breasts. If they did, the guy pictured above would certainly be illegal. (I assume it's a guy based on the facial and chest hair... If transgendered, they are probably becoming a man and taking lots of testosterone. It's safe to assume the person is male or mostly male.)
Hopefully this image serves as new ammunition for top-equality... Go ahead and start using it when talking about this issue. It'll certainly confuse the opponents!
Update: I did eventually use this picture in the GoTopless Chicago protest, and pictures of us holding the sign have been circulating. It was one of the favorite signs at the event.