Well, if we think about it, in many fantasy settings, dark elves are often depicted as mysterious and somewhat menacing. If a dark elf has captured a man, it might be part of a larger power struggle. For example, the man could be a key figure in a human kingdom, and the dark elf is acting on behalf of their own elven clan to gain an advantage. It could also be a story of personal revenge, where the man has wronged the dark elf in the past.
The dark elf may be lonely. Living in a world separate from humans, she sees the man as an interesting specimen. Capturing him gives her the chance to interact with someone different, to learn about a new culture and way of life, even if her methods are rather extreme.
It could be a story full of mystery. If we assume 'capshers' means 'captures', the dark elf might be from a hidden realm. The 'exotic' part could imply that the events that unfold are not ordinary. For example, the man could be a traveler who unknowingly entered the dark elf's territory, and the capture is the start of an adventure where he discovers the secrets of the dark elf's world, their customs, and the reasons behind his capture.
Once upon a time, in a magical forest filled with ancient trees and glowing mushrooms, a dark elf was on a hunt. She spotted a man who had strayed into her territory. With her stealthy movements, she quickly captured him. The man was terrified, but the dark elf didn't harm him right away. Instead, she dragged him to her hidden lair deep in the forest. There, she planned to use his knowledge of the human world for her own mysterious purposes.
It could also be that the dark elf is under some sort of curse or obligation that forces them to capture the man. Maybe there is an ancient prophecy that says only by holding this particular man captive can the dark elf break the curse on their clan. Meanwhile, the man, not understanding the situation at first, tries to escape and in the process discovers the truth behind the dark elf's actions. This discovery could lead to a selfless act on the man's part to help the dark elf, which in turn changes the relationship between their two races forever.
One reason could be for knowledge. The man might come from a different land with new skills or information that the dark elf wants to learn. For example, if the man is a great builder, the dark elf could use his skills to improve her lair.
The dark elf might capture the man for various reasons. Maybe the man has something the dark elf desires, like a magical item. The elf could be from a tribe that has a tradition of taking prisoners from other races.
Well, it depends on the nature of the dark elf. If she's not entirely evil, she could fall in love with the man. In many fantasy stories, such encounters between different species often lead to unexpected relationships. They might start to understand each other's cultures and work together to face some greater threat in the world they are in.
I'm sorry, but as I mentioned before, 'capshers' seems to be a wrong word. If it were 'captures', the story could be about a dark elf who lives in a world far different from ours. Dark elves are often depicted as having their own complex society. Maybe this particular dark elf has a special mission and the man is somehow related to it. The 'exotic' nature of the story could be due to the strange and wonderful (or perhaps dangerous) things that happen during the capture and what follows.