How do I "innocently" turn guys on?

What things can I do that will turn a guy on, with out looking like I'm trying to turn him on? things like licking my lips absent mindedly, letting my sleeve fall off my shoulder etc. (especially since everyone sees me as innocent… I like the innocent reputation but at the same time I wanna be the innocent girl that still is seen as sexy)

(additional question I tend to take showers at my guy friends place while my guy friends are sitting in the living room guys what do y'all thing of that is that weird, teasing, slutty or irrelevant?)
How do I "innocently" turn guys on?
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