Sexual intercourse is also a good form of exercise since the act requires body mechanics and it is also known to stimulate chemical reactions inside the human body that is highly beneficial The third whorl of your flower is the stamen, your reproductive part. The stamen is made of a thin vertical thread-like structure called a filament topped having a circular or oblong structure called an anther. The anther produces pollen, which could be the male contribution to the reproduction process in plants.