Surprise Cock Growth (Patreon)

This is based on a rough sketch done by a friend of mine, and I liked it enough that I asked him if I could do a full colored version. I also decided to make the bottom guy human too, since I don't really do enough furry on human stuff. And while I didn't include dialogue on the pic this time, I imagine him saying something like, "Ooh, feels like a lot more sliding back out than went in!"