Responses
Someone here explained it pretty well - @AlexDiaz - "uno needed to get the tiny chip with the data past security so he stole enzo's cigarette, put it on there, and when enzo used the cigarette again the thing stuck to his tongue. Then later when they went through security uno got enzo to walk past the metal detector (enzo's the only person in the building who can pass through it without raising any alarms) and then uno kissed him and used his tongue to steal the chip back"
Good to now that I'm not the only one that don't get it, like if the chip was on enzo tongue how didn't he... oooh the anesthetic, ok, so, if it just stick to membrane how it goes to uno's tongue to the cigarette if the tongue was "stickier"?