"Arrangement with sailor" joke

A depressed young woman was so desperate that she decided to end her life by throwing herself into the ocean.
When she went down to the docks, a handsome young sailor noticed her tears and took pity on her.
"Look, you've got a lot to live for." he said. "I'm off to America in the morning, and if you like, I can stow you away on my ship. I'll take good care of you and bring you food every day."
Moving closer, he slipped an arm around hers houlder, winked at Her and added I'll keep you happy, and you'll keep me happy."
The girl nodded. After all, what did she have to lose?
That night, the sailor brought her aboard and hid her in a lifeboat. From then on, every night he brought her three sandwiches and a piece of fruit, and they shagged furiously.
Seven weeks and three days later, during a routine search, she was discovered by the Captain. "What are you doing here?" the Captain asked.
"I have an arrangement with one of the sailors," she explained,
"I get to go to America, and in return he's screwing me."
"He certainly is," the Captain replied,
"This is the Dun Laoghaire to Holyhead ferry"