An actor in a light-blue hood and body suit swims in dark-blue water. She makes the case that a penis in water presents a challenge: it produces drag and might be snagged. She demonstrates how a right whale tucks his penis inside his body until erect. We watch more than one erect male appear around a female, who turns on her back keeping her vagina at bay while the males determine who is strongest. Then, the strongest male, ready to mate, waits until she needs air and turns over.