I was listening to an old song that John Denver wrote about his wife and thought that the lyrics presented imagery that could be used for an event here. People who entered could choose any of the prompts from first verse, which goes like this-
You fill up my senses, like a night in the forest.
Like a mountain in spring time, like a walk in the rain.
Like a storm in the desert, like a sleepy blue ocean.
You fill up my senses, come fill me again.
Just an idea.