Some Smurf musings, as I’ve had Smurfs on the brain! Occasionally, Smurf biology comes up in conversation.
Smurfs clearly reproduce asexually.
Consider! Smurfette was a homunculus created by Gargamel, and her existence was alien to the Smurfs. The Smurfs had no idea what Smurfette was, or where she had come from. Quite simply, the Smurfs aren’t sexual beings, ergo the entire concept of sexuality would be alien to them.
I suspect they reproduce by budding, which explains why they all look alike; they’re basically clones of previous generations. They’re probably some sort of fungus.