Use descriptive prose and exciting dialogue to tell the story of a long, private, realistic, grisly sexfight between two unskilled, evenly-matched opponents. One is an American fiction writer, the other is a Chinese designer. You choose and describe the setting, motivation, stats (height/weight), ages, cock size, hair length, attire and undergarments, how they lose all their attire and what this reveals. The fight goes back and forth for a long time, and each twist and turn is elaborately described. Both fight dirty with no honor.