Who knew Anne Frank had a dirty sense of humour?

Two pages recovered from the young Jewish teen’s famous diary have been published, reports CNN. Covered with gummed brown paper, researchers have been using image processing techniques to find out what secrets were lying in these entries that were written on September 28 in 1942.

That’s three months after a then-13-year-old Frank and her family went into hiding to avoid being captured by Nazis during World War II.

What did they find?

Some dirty jokes about sex, prostitution and contraception.

We kid you not. In Frank’s own words:

I’ll use this spoiled page to write down ‘dirty’ jokes.

You might have to watch a short ad before this video clip plays, but then you’ll see some CNN coverage:

The pages contained five crossed-out phrases, four dirty jokes and 33 lines about sex education and prostitution.

This is one of the jokes, courtesy of the BBC:

Do you know why the German Wehrmacht girls are in the Netherlands? As mattresses for the soldiers.

Then there’s this, reports TIME:

Regarding sex, Frank talked about how when a young woman gets her period around the age of 14, it is a “sign that she is ripe to have relations with a man but one doesn’t do that of course before one is married.”

On prostitution, Frank noted that “in Paris they have big houses for that.”

Ronald Leopold, executive director of the Anne Frank House, said that Anne Frank writes about sexuality in a disarming way:

Like every adolescent, [Frank] is curious about this subject. She also writes about it on other, uncovered pages. They bring us even closer to the girl and the writer Anne Frank.

Indeed they do.

[sources:cnn&bbc&time]