The question of "what's an individual" is very interesting. I often thought of the concept of an individual organism as being something unquestionable. Yet it is interesting to think and ponder about this question. It even brings us to philosophical and spiritual questions such as does a man and wife blend together and become at some point in time a single individual? Do twins or very close friends at some point in time become one? Is the concept of separateness of individuals something that can be changed if just for a temporary period of time? This concept can be even extended to religion and religious beliefs and oneness and separateness. Such concepts though might be a bit too touchy to discuss in a blog like this, so I'll do with planting this seed of thought in your mind and leave you to explore it on your own.