I might do a painting like this, but rather than painting a streak with a person. I'd paint a streak of emotions, or possibly things that have triggered sever emotions in my past. The paintbrush painting this caught my eye.
As the edge of the moon touched the top of the waterfall the cascade turned the color of the pale yellow moon. Slowly the light touched the river and began to flow down the river. He watched, pensive, as his cloak flapped int he light breeze.
"We may all be netted together" - Darwin. This picture is a great way to illustrate and explain the relations/interactions within all animals. Does not necessarily relate to sexual selection, but a good representation of all Darwin theorized of.