Almost all frogs fertilize the eggs outside of the female's body. The male holds the female around the waist in a mating hug called amplexus. He fertilizes the eggs as the female lays them.
Your gut is sometimes called the “second brain”. The gut has 100–500 million neurons, forming the enteric nervous system that controls digestion independently of the brain.
The vaginal canal has a collapsed, folded structure (rugae) that expands when aroused or during childbirth. These folds increase elasticity and surface area.
