Double cross is crossing your arms around their back.
Cross is having one arm going across their back to the shoulder and the other around the waist.
Parallel arms is having your arms parallel around their back.
Around the waist is self explanatory.
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Hugging girls that you see everyday is awkward I'm always afraid of violating her boobs and rubbing my penis against something But other than that... [spoiler]it makes me feel good Real Good[/spoiler]