Historical clue formulations

• Graphic novels? — 2026-04-30
• Salacious material — 2026-02-03
• Porn — 2025-07-15
• X-rated material — 2025-06-11
• Raunchy material — 2024-04-30
• Blue material — 2023-12-27
• "Not safe for work" stuff — 2023-06-14
• NSFW stuff — 2021-12-06
• Crude content — 2021-06-17
• Raw material? — 2021-04-11
• Salacious stuff — 2021-01-19
• Blue material — 2020-08-19
• Object of dirty looks? — 2020-07-28
• N.S.F.W. stuff — 2020-02-02
• Dirty pics — 2019-12-17
• Salacious stuff — 2019-09-01
• Unlikely book club recommendation — 2017-04-23
• X-rated stuff — 2016-08-24
• Blue books? — 2016-07-02
• Filth — 2016-05-23
• Obscene material — 2016-03-07
• Prurient material — 2016-01-31
• X-rated material — 2015-12-27
• Google SafeSearch target — 2015-11-01
• Some banned literature — 2015-06-18
• Porn — 2015-05-05
• It's blue — 2014-12-11
• James Joyce's "Ulysses," per a 1921 court decision — 2014-11-02
• Porn — 2014-10-08
• Material blocked by parental controls — 2014-07-13
• Sanitization target — 2013-04-27
• Filth — 2011-06-22
• Porn — 2011-04-11
• Porn — 2010-12-27
• Dirt — 2010-04-04
• Net Nanny no-no — 2009-11-20
• X-rated stuff — 2009-06-03
• Blue prints? — 2008-10-22
• Great literature it's not — 2008-10-02
• Dirty reading — 2008-01-29
• Dirty magazines and such — 2007-10-18
• Blue matter — 2007-03-21
• Scuzz — 2007-03-10
• Blue prints? — 2007-03-02
• Tom Lehrer's anti-censorship song — 2006-08-05
• Dirty reading — 2006-06-12
• Dirty literature — 2006-02-14
• Blue material — 2005-07-29
• Contents of some plain brown wrappers — 2005-04-13
• It's not clean — 2004-12-31