[this_ol_patriot]

Historically, it was used as an anesthetic in surgery and dentistry. Inhaling the gas can cause euphoric effects, which led to it being named "laughing gas."

I thought farts was the "laughing gas" I know more people laugh at farts and algore than they do at the dentist.

[The Cajun]

I know more people laugh at farts and algore than they do at the dentist.

There is a problem with that statement, you are assuming there is a difference between a fart and Algore.
I don't think that has been established scientifically yet.