We could put an end to the stupid jokes if we just changed the name of the planet. How does "Urectum" sound?
"Futurama" beat you to that joke by several years:
Fry: Did you build the Smellescope?
Farnsworth: No, I remembered that I'd built one last year. Go ahead. Try it. You'll find that every heavenly body has its own particular scent. Here, I'll point it at Jupiter.
[Fry sniffs.]
Fry: Smells like strawberries.
Farnsworth: Exactly! And now Saturn.
[Fry sniffs.]
Fry: Pine needles. Oh, man, this is great! Hey, as long as you don't make me smell Uranus.
[He laughs.]
Leela: I don't get it.
Farnsworth: I'm sorry, Fry, but astronomers renamed Uranus in 2620 to end that stupid joke once and for all.
Fry: Oh. What's it called now?
Farnsworth: Urectum.
In fact the planets name is pronounced "YOOR-in-us", but who am I to spoil a joke that was tiresome on the playground
Uranus/Urectum: it would still have a methane atmosphere.
I don't think it would prevent people from repeating old, sophmoric jokes.
...such as "Rectum? Hell, it killed the sumbitch!"