When a woman is so sexually charged she treats a man's penis with an extreme amount of attention for a prolonged period during any particular sex session. The reference is that she's acting like it might be the only penis she has seen, or may see, for a considerable amount of time; i.e., like she's on a deserted island and just found it.
A masturbation technique in which a man rips the wings off of a fly, takes a bath and places the wingless fly on the head of his erect penis. The masturbater allows the fly to walk over the tip of the erect penis (like a castaway on a desert island) until the man ejaculates.
Hey Dennis, can you catch me a fly... I think I want to take a Desert Island after dinner.
"Hey Ozzy Osbourne, what ten British albums would you take to a desert island?"
"Revolver, Sgt. Pepper's Lonely Hearts Club Band, Band on the Run, So, Dark Side of the Moon, Abbey Road, Imagine, Blizzard of Ozz, Led Zeppelin, and Machine Head."
Home of Acadia National Park, Mount Desert Island High school, and home to the worlds most bad asspeople. The Backside is the best place to be on MDI, and Southwest Harbor people are wanna-be-backsiders.
I'm a REAL backsider, from tremont on Mount Desert Island, maine!...bub.