Michael Phelps is 23. Michael Phelps smoked weed, probably does it quite often and will probably continue to do so. I bet he has even done a line of blow off of a stripper's ass. Who gives a shit? It happens. Party on, Michael. Just like shaving, wearing Old Spice, checking out 17 year-old girls and buying a tool set, it is a part of becoming a man. While everyone worries about your endorsements, I only see it as an opportunity for new deals.