Please help! how do you grind with a guy?

Cause im having a school dance and whenever i grind i think i do it wrong, cause i see other people and i think im doing it wrong so like how do you do it? what do you mean by '; swing your hips like a figure eight?'; like do i swing my hips from side to side?

also how to you grind facing face-to-face?Please help! how do you grind with a guy?
basically you just kinda hump each other. lol. i know it sounds weird but still :)

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