I prefer to speak of 'interdimensionals' rather than 'extraterrestrials' because the latter has connotations of 'little green men' and all the other cliche responses. Nor does it tell the full story.
“The real cause of personal existence is not the favor of the Almighty, but the sexual love of one's earthly parents.”
“Advertising is the principal reason why the business man has come to inherit the earth.”