-Bloo-,
Human,
12 years ago
Okay, that was more or less a joke, Penny. Way back when, there was a thread about whether or not you'd have serious sexual relations with an Alien/Predator - let's not go back to that. Ever.
Like I said, for all we know, they've evolved to the point where they don't have any natural use for them, other than maybe protection for their vulnerable mouths. It could also be used to amplify or direct their battle cries.