Only a couple of my bros laughed, girls scowled and looked at the MALE teacher who made me apologize but didn't send me to the office

(http://www.autoadmit.com/thread.php?thread_id=5575344&forum_id=2#47961907)

The joke is a play on words and a mix of historical references with a risqué twist. Here’s how it works:

1. Historical Context: Sacajawea was a Native American woman who played a crucial role in the Lewis and Clark expedition (1804-1806) as a guide and interpreter. The expedition explored the western part of the United States, but there’s no historical basis for the claim that she “slept with everybody” on the trip.

2. Wordplay: The punchline hinges on the phrase “celebrated by founding Idaho.” This is a humorous stretch, as Idaho was not founded by Sacajawea, nor does it have anything to do with her directly. However, the joke plays on the sound similarity between “Idaho” and the phrase “I-da-ho,” which sounds like “I the ho” (slang for “I’m the prostitute”). The humor comes from the double entendre, suggesting that because she “slept with everybody,” she would then identify as “the ho,” and thus “founded” Idaho.

3. Absurdity: The joke is meant to be absurd because, of course, Sacajawea had nothing to do with the founding of Idaho (which became a state in 1890, long after her death), and the implication of her sleeping with everyone on the expedition is baseless and deliberately ridiculous.

The humor comes from the unexpected and provocative twist in the punchline, as well as the wordplay.

(http://www.autoadmit.com/thread.php?thread_id=5575344&forum_id=2#47961929)