.Breeding.
Curios breed like normal humans, therefore they can breed with other humanoid creatures. While it is preferred that the Curios breed with Curios, I will allow them breed with other OCs that they've developed relationships with or with your other (humanoid) pets as long as I have the written permission from the shop owner allowing you to do so.
Curios can breed once they hit adulthood. Special exceptions will be made for Curios having offspring in the teen stage, if you can give a good enough argument for it.
When Curio produce offspring, they will typically have one child. Twins and/or triplets will be rewarded to those that are more active.