The female wood mouse has multiple mates, so the sperm of this wood mouse may be competing with sperm from other males.
No matter the species, mating rituals are pretty weird. Take the praying mantis. After an intimate tryst, the female mantis bites its partner’s head off. But when it comes to sexual hijinks, nothing beats the garden snail. During sex, garden snails often pierce each other with miniature darts. Any way you slice it, garden snail [...]