It is the last day of the month, which means, as always, it’s mailbag time! Today David looks at the Great Man Theory vs. the Cultural View of investing, whether to invest a little bit at a time or in big lump sums, and why the market’s P/E ratio shouldn’t guide your investing decisions. Plus, another misattributed quote and quite possibly a dirty joke! Get $25 off your first purchase at bombfell.com/fool