"Of course I'm following you," Stiles said. It wasn't that hard to understand where she was going with this. While Malia was busy looking for someone who could meet all of her needs, Lydia was going to find someone to knock her up so she could provide the first baby to the gods and goddesses who were in charge of the project.
He was glad that both of them had plans, since he had no idea how to make himself useful here yet. He could follow directions, sure, but he had no idea how to build things or how to hunt or fish. He certainly wasn't the strong, protective type. It was unlikely that anyone would want to pick him to procreate with.
So, basically, he was totally missing Lydia's point. "Are you going to ask Scott?" he asked. "Or that guy Reese?" They both seemed like they would be decent options to balance out Lydia's smarts on a physical level.