I too share your fear of aliens, and anal probing, but mostly the aliens themselves.
But I don't think they're evil. But err, this song's title and topic seem like a gymmic, because the song doesn't necessarily make me think of getting anally probed. I do like it though, don't get me wrong. I think this is a good piece of music, but it needs some more variation. I like that the piano comes in at points and has a long release. A different chord progression that is within the key is suggested. Overall I like this. The synth that takes over the majority of the song that sounds like a distorted voice making guttural sounds is perfect with the notes that it's playing. The song actually does make me think "ALIENS" but not "THEYRE going to BUTT FUCK me with a METAL OBJECT"
So, you should put some sounds in that suggest that.
I mean, not literally screaming that, because that would make the song seem like it's trying to be humorous, just work on the atmosphere.