He grimaces, ears flicking under his Mask, but it's not aimed at Wayne.

"Jesus Christ I hate human anatomy so much," he mutters, passing the notebook back in case Wayne wants to, like. Take notes. "Mammals don't lay eggs, females have a special organ called a womb that serves the same purpose of like, fetal growth casing. Gestational period of about nine months, then the baby gets birthed whole and free."