(Strip Number 4003, Original Publication Date, 9 May 1981)
Panel 1: We find ourselves at John's office; as he helps his young patient into the chair, John (who looks as if his head is on backwards) tells the little boy "Okay; into the central command position and we'll ready the ship for lift-off."
Panel 2: John's next attempt to pretend that he's Rocket Robin Hood, DDS is to tell the eager young space cadet "X-rays, a-okay; now we'll use the astroprobe to check for alien life forms."
Panel 3: Having confirmed that the boy has a clean bill of dental health, John boasts to Jean that his ol'outer space patter really works.
Panel 4: She scores a direct hit on his ego by telling him that if he calls her the droid one more time, she's going to quit.
Summary: First off, you'd have to be a bit of a dick to act as if your hygienist was some sort of grinning slave designed by nature to serve you. Second, no real sci-fi fan talks like this; what this is is Lynn's attempt to show us what goes on in J-Rod's office colliding with her botched attempt to invoke the sci fi that bores, horrifies and confuses her.
ETA: Since it's Mother's Day Sunday, Lynn has changed the banner to reflect that fact.
