Iguanas, Koalas and Komodo dragons all have two penises.
Iguanas and Komodo dragons, like other snakes and lizards, have a hemipenis, that is two sex organs that deliver sperm. These are held inverted in their bodies. They use only one penis at a time, and often alternate use.
Koalas, on the other hand, have a bifurcated penis, a penis that splits into two. The female koalas have two lateral vaginas, and two uteri.
(Sources: 1, 2)
