[He'll allow it with a lot of initial hesitation. For the most part they're about as warm as a regular finger would be. But when he activates a light it heats up a little bit.]

Oh! Well I suppose that would make sense as well...

Typically, the combination of colors are used in traffic lights, but they can be used for a number of things. Green is usually seen as good, yellow is so-so, and red is either bad or used as a warning of sorts. In terms of traffic, green is "go", yellow is an alert that the light is about to turn red, and red is "stop".