Not everyone who smokes gets clingy. Mostly, they get sleepy and hungry- which is where the munchies come in handy. I, personally, get tired and a bit bitchy. Or at least I used to. My best friend gets extremely giggly and does stupid, random shit that gets her in trouble:)
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My friend goes mental, she laughs sooo much it's actually unreal. I tend to zone out, but that's no fun.. But yeah after the enitial effects, you get the monging out period, which is ok, if you like being hungry and sleepy :L