Worth mentioning I'm in Ontario, Canada. Not sure if maybe it's different in different parts of the world but for me and my sister when we've done it, we had 1 of 3 options.

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I believe it was the numbing thing which I did, I think it's laughing gas which I believe my sister did, and the good ol' knock out.

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It was progressively more expensive and like I said I'm generally comfortable with all that stuff, so I chose the numbing. The knock out sounded the most fun though going off videos of people post procedure.