A Plane Crashes In The Pacific Ocean. Only Three Survivors Make It To A Desert Island

Two men and a woman.

Once they built shelter and get a fire going, the woman says to the guys: "I'm a nymphomaniac, I need sex, everyday." She then lays out the ground rules. One man would sleep with her on even days and the other on odd days. After a few weeks the woman dies. One man says to the other: "Don't know about you but I thought that odd/even days thing was pretty sweet. How about we keep it going?" - Not sure man, that's not how I roll. - Listen, sex is a natural, human thing. There's only the two of us here. Keep your mouth shut, I'll do the same. Who will find out? - Yeah, I guess. So there they go. Each taking their turn on their respective days. After a while one goes to the other: "Look, I gave it a shot but it grosses me out too much. I'm putting an end to this. I'm out." - Yeah I guess you're right. It is pretty gross. Come on, help me bury her.