Lyric discussion by thedurganflurgan 

Cover art for Sunspots lyrics by Nine Inch Nails

I think i'm the only one that notices this, but I think this song is about Galileo. He stared at the sun, studying sunspots for his entire life, which eventually caused blindness. for the line "Now I just stare into the sun and i see everything I've done, I think i could have been someone, but i can't stop what has begun. "now i just stare into the sun" Is obviously staring into the sun, which Galileo did a lot of. "And i see everything I've done" Meaning It has a hypnotic look to it(it makes his life flash before him) "I think I could have been someone" Refers to after he went blind(He wishes that he did not go blind;he feels he wasted his life.) "He can not stop what has begun" Meaning he cannot stop looking into the dun once he's begun. I think that the sexual part to the song is about how looking at the sunspots bring out a primal instinct;or sexual in this case. "When everything is said and done and there is no place left to run" refers to Galileo about to die on his death bed. "I think I used to be someone but now i stare into the sun" meaning Galileo felt like he didn';t have a name for himself anymore, but just keeps staring.

All in all I think that this song has a literal meaning to it and that NIN is intellectual enough to make a song about Galileo.