Heat never came without a sign. Eugene just didn't realize it because, just like with pheromone, his 'signs' were almost ridiculously unnoticeable.
As he was clutching onto the sweatshirt that smelled of freshly-cut grass and tree bark and peace and silence and everything that was warm and soothing, Eugene thought about how he easily got warm the day before at the thought of Arthur and their future second child.
He had thought he was just getting bashful about how Arthur gradually stopped getting flustered about the idea of having another child--and then, later, about how devoted and trustful Arthur was. There was nothing weird about blushing around one's fiancé, after all.
The thing was...Eugene rarely blushed, unlike Arthur. He rarely felt his face heating up, especially in public. Having that happen often in one day, as it turned out, was a sign.
