There are some species of frog (or maybe just a small handful) that can actually breathe through their skin - they don't have lungs. One of my old bosses at the aquarium told me about it.
AND another species "gives birth" through it's back. *gasp*
Did you know almost all species of penguin are monogamous? They rarely take a second "life partner" or "mate" if the first one dies. And if they do, it's usually because they haven't produced offspring.
And there are gay penguins in the world <3