---The male and female frogs then undergo amplexus. This involves the male mounting the female and gripping her (sometimes with special nuptial pads) tightly. Fertilization is external: the egg and sperm meet outside of the body. The female releases her eggs, which the male frog covers with a sperm solution.
-- from Wikipedia

Suwako: ...and that's the story of how you were born!

Sanae: NOOOOOOOO!!!