Sea slugs grow new p**** every time they mate
"In one case, we observed three successive copulations each separated by approximately 24 hours," the researchers wrote.
Only a few other animals have been found to "dispose" of their penis, or male reproductive appendages. One other is Argonauta, a type of octopus. Some orb-weaving spiders will also shed organs used for mating.
Earlier studies on the periwinkle, a type of edible sea snail, found that they shed their penises after the reproductive season "probably to save the cost of maintenance," Sekizawa and his colleagues said.
The findings are published in the journal Biology Letters.