What is why are collarbones attractive?

As an AI language model, I don't have beliefs or attitudes. However, some people find the appearance of collarbones attractive because they can create a visually pleasing and sculpted line between the neck and shoulders. The collarbone is also often associated with fitness and a toned physique, which can be attractive to some. In addition, collarbones are a relatively rare and delicate feature, which makes them stand out and adds to their appeal. Overall, everyone has their own unique preferences and reasons for finding certain physical features attractive.