The secret of turning any day into Valentine's Day: it's Prof. Oddfellow's Penetralia.

George Parker writes: "Does being mesmerized by this video mean you hypnotized me? Or was my choice to surrender to your hypnotic dish of images and sounds a form of self-hypnotism? I choose the latter and am on my way to being certified!"

People's 13 top fears about numerology:

"Sadly, much of the world's humor is unclean" (Ray Comfort, Think on These Things, 2017).  From Lenoir-Rhyne's 1915 yearbook.

Are any ghosts watching?  We roll in the Spirit Applause-O-Meter to find out.  It's Prof. Oddfellow's Penetralia.  Thanks to KlingonCaptain who wrote, "I just realized that a lot of sitcoms from the days of analogue film probably have a lot of ghost cast members but we just can't see them. Can you imagine what The Andy Griffith Show, Dick Van Dyke Show, and The Flying Nun would be like if we could see the spirit cast members?! If only the Sylph Scope was real and we could use it to see ghosts."

Tuning into parallel universes: it's Prof. Oddfellow's Penetralia.

Help solve the enduring mystery of the Tomb of the Unknown Soldier: it's Prof. Oddfellow's Penetralia.

Jonathan Caws-Elwitt notes:

"In my opinion, we don't see enough these days of those hilarious 'ten-foot poles' that come from the wings, apparently under their own power, to supply missing props”

From Elon's 1923 yearbook.

From Full of Fun by Dean Rivers, George Thatcher, and Henry Firth Wood, 1921.

Two jesters aren't necessarily twice as funny, but it's a trend in old yearbooks.  From Washington State's 1906 yearbook.

Rhubarb Vaselino enters the arena of the ridiculous.  From The Film Daily, 1922.

It's only funny if thou wouldst laff.  From Indiana University's 1909 yearbook.

From Guilford's 1936 yearbook.

In the golden age, the presentation of a skerered banana could trigger tears of laughter.  From the 1929 Ole Miss yearbook.

We kept this old yearbook page only for the questions it raises.  Is this seemingly unremarkable photo of a modest fountain in the mid-distance indeed humorous in a way that has been lost to time?  Do we tend to take old photos too seriously?  From Susquehanna's 1929 yearbook.

Someone should craft a book on finding humor in seances via spirit slates: Jokes that Write Themselves.

"When ether waves run wild and humor fills the ozone."  From The Wireless Age, 1922.

It's only funny if some thought and imagination go into it.  By Gus Edwards for Cartoons Magazine, 1917.

This is utter bullshit and the perfect example of my horror (not too strong a word) of the cold, soulless mentality of white-coat scientists (whom Robert Anton Wilson dubbed the New Inquisition).  From Popular Mechanics, 1924.