A married couple and a single man are stranded on a deserted island after their cruise ship sinks.
After serveral weeks with no rescue, the married woman and the single guy grew fonder of each other. They wanted to hook up, but the husband was always close by on the small island. Their desire only grew, and they knew that they had to figure out a way to have sex.
One day the single guy climbed up a tree to search for a resuce ship. The couple were laying on the beach, minding their own business. Suddenly they heard the man yell down at them "Hey! Stop fucking down there!"
"What?" The husband replied back.
"You heard me! Stop screwing down there! Get a room!"
The couple, startled, only looked at each other in disbelief. "What are you on about up there?" he yelled back.
"I can see you two fucking down there, plain as day!" the man replied.
"We're laying next to each other. We're not even touching!"
The man climbed down from the tree. "Huh. I'll be damned. From up there it looks like you guys are having a go at it. Climb up and have a look for yourself if you don't believe me."
"Well, alright then." the husband said. "I'll put an end to this foolishness." As he climbed up the tree, his wife and the other guy tore their clothes off and began screwing on the beach under the tree.
"Holy shit!" the said the husband. "It really does look like you're screwing down there!"