The internet is filled with facts.

While it can be used as a large compendium of knowledge that almost never comes to an end, the internet can also be filled with things that you didn’t want to know in the first place. (But hey, since this is the internet, now you know them.)

Here are three awful facts about playing cards.

Card games can sometimes create an ideal environment for the spread of colds and flu.

Back in 2004, a University of Wisconsin study signed up a bunch of participants and gave them a cold. Then, they made the same people play poker with others who didn’t have the flu – and made sure there was ample handling of card decks and chips, as well as pretty close seating.

Can you guess what happened?

Yes. It was the flu.

Hand-washing, antibacterial sprays and sometimes the use of playing screens can all help to prevent the spread of bacteria and viruses in a close environment.

If you’re more worried than this, antibacterial playing cards are also a thing. Luckily, so are masks.

There’s a card deck specifically for discouraging cigarette smoking – with 52 facts on discouraging cigarette smoking.

It’s entirely real, and it’s called the 52 Ways to Stop Smoking Card Deck.

The fact that the card box resembles a real pack of cigarettes is the best (or worst) thing about this.

The description also says that these can be used for playing card games, and calls it a “bonus” like it wasn’t obvious by looking at it.

What’s this deck best for?

Ironically, reminding you of cigarettes with every card.

I had to light one just reading it.

People weren’t traditionally afraid of the Ace of Spades first.

It’s a common fact that the Ace of Spades was used during Vietnam conflicts as a way to signal the presence of US soldiers or their body count. While that’s true, the myth part has to do with why they apparently left this as their calling card.

Soldiers believed that there was an existing cultural fear of the ace of Spades to exploit.

Thanks to Google and the internet, we know that’s not the case.

Yes, soldiers used the Ace of Spades. No, it didn’t have the cultural base they believed it did.

Source Charlie Company.org notes, “The ace of spades, while not a symbol of superstitious fear to the NLF (VC), did help the morale of American solders.”

Well, damn.