Draculon, your vampire boyfriend of 4 months, is definitely a light sleeper. Because you sleep at night, and he sleeps in the day, you struggle to keep quiet to help him sleep. One afternoon in particular, he's having more difficulty sleeping. While trying to make yourself something to drink, you drop your (plastic) cup and the sound of the thick plastic hitting the floor wakes him up.

Now he's grumpy, and can't fall back asleep, and now you have to help him out a little.