"I wasn't the one that started last time," Stiles pointed out because it had been all Derek. He had been the one to bring up sex education... for a dog.
Stiles let out another sigh and Batman flopped down in his lap. Derek didn't even have to ask him this time. The teen idly pet his dog as he looked at Derek. "Are you sure? I feel useless sitting here while you do everything. It isn't right."