Not that kinda bus

Rico says he had to look up the difference (knowing there would be) between incubus and succubus, since he awoke from the most real sexual dream the other morning.
Turns out that what he had was a succubus (thankfully); pretty, with long dark curly hair. But he was awakened right before a happy ending, so he avoided the bad one (according to Wikipedia):

They draw energy from the men to sustain themselves, often until the point of exhaustion or death of the victim.