Why did the astronaut break up with the moon?

setup: Why did the astronaut break up with the moon?

[BILL] in full moon suit, helmet welded onto frame Pssht! Houston Control. Over. Pssht!

[Shakes] qua Houston Control Pssht! Houston Control here. What’s your status? Over. Pssht!

[BILL] Pssht! Permission to start return to earth. Over. Pssht!

[Shakes] Pssht! Starting return is on 3, 2 and 1. GO!

(([BILL] hop steps to lunar return vehicle. Opens hatch))

[BILL] Pssht! Houston Control. Interrogative. Over. Pssht!

[Shakes] Pssht! Go ahead [BILL]. What is your question? Over. Pssht!

[BILL] Pssht! Do you have any idea why so many dad jokes are set on the moon or in space? Pssht!

[Shakes] Pssht! No freaking idea. Over. Pssht!

[BILL] Pssht! Oh well. I’m glad to be coming home. The moon is a harsh mistress. Pssht!

(([BILL] closes the hatch and lifts off))

punchline: Because it needed space!