Specifically, how they spread.
I once had the rare opportunity to watch a secret spread with X-Ray-Vision clarity, and it was actually really cool and I learned a lot. Which I now share with you!
Not true. Two people kept this secret just fine for a long time. Two is actually a pretty safe number because when people have a big secret they NEED someone to talk about it with.
But it did spread in a few interesting ways, most of which weren't the Dramatic Reveal we writers are so fond of. 😁
Several times we saw people swear up and down not to tell a soul, then immediately turn around & tell the One Person They Trust the Most, who Absolutely Must Know and Doesn't Count.
One of the first people to figure out the Big Secret was someone who was just very socially perceptive, saw the character's reaction to something and figured out the secret based on that reaction and bunch of other tiny clues.
You see, when multiple people know a secret, they start exchanging Meaningful Glances and Veiled References about it.
They try to hush others who are treading too near the secret with people who don't know in the room.
Which, of course, draws WAY more attention to it than anything else. 😅
This was how the dam broke.
NOW YOU KNOW.