"Hi! You're not dreaming, you're not hallucinating, and we're not wearing costumes. Ahem, let me get my instructions here. 'Hello Sir, Madam, Or Youth, we are furry nude busty skunk girls from outer-space, our ray gun transform and brainwash anyone we zap. Surrender, you have no chance to resist us.' Okay, now seriously, me and my sister here were sent to help pave the way for our invasion. And we've chosen you to be our first convert. We hacked your internet and found there are people like you who don't mind this sort of thing. And yes we do resemble the skunks of your planet, and don't even start the joke, I'll have you know we smell like roses. Our translator device is just until we zap you and you become one of us. While we're invaders, we really don't want to do this by force."
"We're worried that if we get careless, you'll kill yourselves to spite us."
"And that sucks, because then you'll be assimilated by the alien busty zombie babes."
"Or you'll just vaporize your own planet and yourselves to spite them too."
"And you'll then be assimilated by the alien goth cuties of nothingness."
"We talked it out with the cat-girl and wolf-woman empires, and they agreed to let us have this one. So could you help us make the genetic and cultural imperialism of your planet as smooth and painless as possible? PLEEASE don't run away screaming or try to pull out a shot gun and kill us, it really won't change the outcome. Can we PLEASE do this invasion in a civilized manner? We have cookies on the flying saucer waiting for you after you've been zapped."