Superman Returns Explained

This single-panel piece of brilliance from Apropos of Something (thanks for the tip, Gene) tells it like it is, but omits just a few vital points:

• Why is everything on the Kent farm manufactured in the 1930s if this takes place in 2005?
• Why did Superman need to take his spaceship to Krypton? Couldn't he just fly through space like he could in the comics? And is his spaceship powered by nudity or something?
• If Superman's such a great guy, why's he stalking his old girlfriend?
• Most importantly: Never mind the asthma - why does Superman have a retarded son?

That is all.