In space, no one can hear you eat cookies.
From Thinkgeek:
Aliens. Those darn Xenomorphs are always trying to shove something down the throats of humans. You know, maybe if they made the Chestburster embryos look like cookies, the Facehuggers could get cushy desk jobs. Or, you know, something else they have the skillset for. They’d probably make great massage therapists, what with all those little appendages.