"Mars ain't the kind of place to raise your kids;
In fact, it's cold as hell.
And there's no one there to raise them
If you did."
But then it all falls apart, doesn't it?
"And all the science I don't understand.
It's just my job five days a week."
What kind of fucked-up space programme sends a bloke into space who knows fuck all about science? And he's in space -- where exactly does he go the other two days in the week?
Also: "There's no one there to raise them if you did." If you did what? If you raised them on Mars? There would be no one on Mars to raise your kids if you did raise your kids on Mars.