Carmen Electra stuck her tongue in a warm, familiar place last night ... Dave Navarro's mouth -- and the exes weren't shy about it.
They were walking into a hard rock award show in downtown L.A. when they took a moist selfie, which Dave tweeted, saying ... "May get lucky with one tonight."
Carmen and Dave divorced in 2007 after 3 and a half years of marriage ... and a reality show.
Who says you can't go back?
Based on how Carmen looks in this video -- we definitely get it, Dave.
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