I think everyone overlooked a very important fact here... it is not would you rather A or B, it is would u rather living or dead? Choice B has gills... dead on an island within minutes. So unless you got necrophilia and all...... 
Although I suppose I can't disagree with you if you chose B for the fwap fwap noise, even if it only lasts a few minutes.
Besides, it isn't necrophilia if the body is still warm, right? Tropical island = very warm.
Yes but.... if you are stranded on an island you will also need food. A) will get old after a while. People say she has nice tits and a pretty mouth but....it wont be long before she stops giving you blowjobs and starts using that gorgeous mouth to bitch about everything. On the other hand.... B)..... offers a unique possibility. Sex... and food.... That's a win win in my book.
BTW.... maybe I'm just getting old but A) looks way too young for my taste. I might be swayed in that direction if she looked like a real woman instead of some overgrown child in a womans body.
