Rav Leon often tells a story about a man who bought a ticket to go on a long cruise.
After a few days, he appoached the steward of the ship and asked if he could supply him with a hammer and and nails. When the man in the neighboring cabin heard the sound of a hammer noisily pounding away, he knocked on door. When his fellow voyager opened the door, the neighbor asked what was making all the noise?
"I'm bored," the man with the hammer explained. "So I decided to make a hole in the floor of my cabin bedroom so that I can see all the sharks and fish swim by."
"You can't do that!" the neighbor responded in horror.
"Why not?" the man answered. "I can do what I want. It's my private cabin. I paid for it. I can do what I want."
"It may be your private cabin," the neighbor answered, "But what you are doing in it can sink the whole ship!"