[Character A] was aroused that morning by the knocking on his door.

I know, from context, that you mean roused, author. Aroused =/= roused. But thank you for making my morning with your English!fail. Unless I've missed something this entire time, and there's something about door-knocking that makes this guy hot.

(Комменты по традиции жгут)
В комментах же наткнулась заново на старую добрую страницу Have A Gay Old Time, а оттуда извлекла лучший образец этого тропа вообще