15 is a common data point too, because that effectively puts you at once every two days. That's my natural rhythm; any longer and I feel grubby (shaving in part

15 is a common data point too, because that effectively puts you at once every two days. That's my natural rhythm; any longer and I feel grubby (shaving in particular). I just don't sweat that much I guess. This is a weirdly posed poll though. Per week is much more aligned with people's recurring schedules. I know I shower 3 or 4 days a week, but it's weird to consider this on a monthly basis.