We squeezed, and pulled, and peeled, and squeezed, and gently rotated the tissue until the cast came free. Will they let female dolphins control where a penis goes, the way a duck vagina does? What do the spirals mean for dolphin sex?
Contact the author at diane io9. They can try to outswim males; they can slap them in the head with their tails; or they can roll onto their backs at the surface of the water, putting their ladybits in the air and out of reach. View on Diane Kelly. Brennan is well-known among biologists for her work on sexual conflict in ducks , and on the internet for her high-speed videos of duck erection.