Why I am sure aliens have not come to earth:

Haha, still not studying, the thing is this, i'm sure than at least a hundred times you've heard something like "aliens are here!!!" or maybe something more original like "I was abducted by an alien, he ate my face, raped me, licked my feet and left me sleeping in my bed looking exactly the same I looked before", and when you kindly ask for proofs, they get all defensive and even a little aggressive.

To all that people, I want to tell you that what you've said where lies, because aliens don't even want to come to earth, and here are some reasons:

If they come to experiment on us:

1.- they could have already created a human farm in their planet, what kind of creature can travel trough space but not have a farm

2.- considering that all abductions where true, they have "experimented" on almost a million freak-faced people, and they always do the same experiment, they should be bored to death by now.

3.- considering it is not the same experiment, some experiments would have failed leaving horrible scars or other side effects, but maybe, the side effects are molten faces, if thats the case, maybe all the experiments went bad.

If they come to tell us something:

1.- they are pretty bad communicators, I mean, PLEASE, WE DON'T UNDERSTAND YOUR FREAKIN' CIRCLES, maybe they should teach us to read before writing to us.

2.- why can't they do like the politicians and throw up a speech in front of a million people and TV's.

If they want war:

1.- they would have killed us like thirty years ago

If they are on a vacation:

1.- what kind of vacation would it be if you have to stay hidden from the natives

2.- this point comes in form of a chat between two of them (looks like one is the father and the other one is a teenage son)

"hey dad! where are we going on the vacation?"

"I don't know teenage son, what do you think of venus?"

"well, I don't know, the gasses are great, but it's not in any more"

"and the earth?"

"GREAT! I love playing hide n' seek, breathing all the poison gases they throw to the atmosphere and eating all that junk food they sell!"

"ok, i'll prepare the ship"

If they are naturalists:

1.- this would be a horrible planet, so why would a hippie alien want to come?

The most probable thing is that they are seriously sick and are humanphilic (that like to have sex with humans), and so they come and rape people, but then, it would be disgusting to think about the scene.

Those are my reasons, and if you have any opinion, let me hear it.

thanks and good bye