Okay, you really needed to know this. Since 1997 I’ve been keeping track of how many days of use I get out of each stick of Mennen Speed Stick deodorant I use until I have to replace it. There’s a surprising variance per stick, ranging from 195 days to 568, all with the same brand and size. Check out the data at “Speed Stick Deodorant,” just added to the Digressions page. Try to contain your excitement.