No blood before 9am

I just cleaned up HD's second bloody mouth in less than 24 hours, his fifth since mid-September. Every time it happens, it takes a few minutes off my life, and depending on the type, sound, and distance of his fall and other circumstances (e.g. time of day, my caffeine, caloric intake for the day), it takes more than a few minutes off. Of course, if there is blame to be had, it would be mine for the taking, since I should prevent him from falling now and for the rest of his life, but let's forget about the blame and just make a deal: no more blood before 9am. If that doesn't work, maybe I'll just have all of his baby teeth pulled.