Squeeze the side, and the S ring emits perfume juiced with pheromones. Three scents for each sex, all custom mixed. I liked the citrus one, but wasn't sure if it was for boys or girls.
You have to inject the perfumes into the ring with a hypodermic needle which is supposed to invoke the "clinical process" of getting ready for a date. The scent is released when you squeeze the side, causing the tiny piezo tubes to contract.
Oh, the feather's just for decoration—I'm not sure it'll help you get laid, either.