I would like to know how many million kilometres of lines I drew in my over 30-year career in drafting and building design, with a bit of sketching when I could. Loved the idea and kinaesthetic experience of 'drawing out' ideas from the mind onto paper. (So, wasn't eager to transition to Computer Aided Design). Now writing seems to have similar qualities of 'drawing out.' It looks like you engage in this process also. Expression 'externalises' the concept to be then looked at from various angles and shaped and reshaped for clarity and concise communication. The communication is going on out and back for us, and out and back to others. I like this idea of commenting on your own work.