Why am I force to create my own blog??

Today,my ethic class had discussed on the topic "Copyright"..
It was an interesting topic as I can know each law was actually established due to some incident happenned in the past..
It was then our( me and my coursemate) lecturer asked us ,what we know about watermark..
Silence..
Then, our lecturer asked again whether any of us has a blog..
Hence, only one among 60 of us raise his hand up..
Thus, we were all asked to create a blog..