Great idea, I think the best part if creating topics, that gives us the challenge to keep writing new material. I studied songwriting online at Berklee and one of the best things was the requirement to constantly create new material. It helped that it cost a lot of money to do the studies, but one of the col things was that all the students had to critique (in a supportive way) each others' writing. Often we were given random topics like a grocery store or an airport. I went through my recording studio recently and found about 150 songs or parts of songs that I had forgotten I had written. There is always a huge satisfaction in completing a new song but often it easier to do other things than keep writing. Let's do it!