I have another story about a planetarium:
When I was eighteen years old and in college, we also had a big inflatable planetarium that my instructor would insert in me when I sat on his lap.
One day he took off my panties and inserted his "landing craft" inside me then said, "We are about to land on Mars and the landing craft needs to eject all of it's liquid contents in order for a safe landing!"
I told him, "Okay, go ahead and discharge! I don't want to jeopardize the mission!"
A few minutes later after I have been bouncing up and down on his cock, he suddenly stopped and said, "Misty, do you feel the landing craft transferring it's contents inside you?"
I told him, "Yes, I feel it pumping inside me! Mission accomplished!"