Chris Brown - Under The Influence (Lyrics)

The lyric is "lightweight" but I really think Chris Brown missed a huge opportunity with "body language speaks to me." Maybe I'm not fully understanding what he means by "lightweight"... she's so intoxicated that she's figuratively floating? She's lightweight because she's small? She falls under the influence easily bc she's a lightweight? I'm simply saying it sounds more clever if her body language speaks to him (because we LITERALLY speak to each other through language). But maybe if you guys could tell me how being "lightweight" could speak to him in terms other than either he likes her being under the influence, or he likes her body, I would find it to be a better lyric. But even so, after all these replies, I still stand by my original opinion