Anthropomorphic Personification: The wind is personified into a cheeky All-Knowing Singing Narrator in a suit. Justified as the same actor appears at the beginning of the episode, wearing the same suit, and playing a TV weatherman who's predicting the very wind that his actor will go on to play.
Unfortunately I wanna have sex with you, I don't know what happened, maybe you lost some weight, For some reason you're now on the top of my To Do List, let's get this over with, So I can focus on other tasks — let's have intercourse, Just pretend I'm seducing you, c'mon let's quickly have intercourse, So I can mo-oove on, with my life.
Artistic License Music: Type 1, parodied in that Nathaniel mimes playing guitar for a few moments and then drops it on the floor (with an audible bonk) because he just can't be bothered.
Brutal Honesty: Nathaniel is very, very straightforward about what he's after, and why he wants it; he wants to bang Rebecca because the UST between them is getting on his nerves and he figures once they sleep together, he can forget about it and move on.
Dance of Romance: Parodied: Rebecca dances around the room while Nathaniel sings, and when they do dance together, it's often in what looks an awful lot like some kind of sexual position.
Intercourse with You: Well, it's in the title. This being Crazy Ex-Girlfriend, it's of the blunt variety.
Blue-and-Orange Morality: The Santa Ana winds are personified as a self-described "prankster", and the effects are presented as deliberate attempts to mess with Rebecca's life. While it pisses Rebecca off, the winds are still a force of nature. They don't consider whether their actions hurt or harm, they're just stirring up mischief "to see what will happen".
Elevator Going Down: Nathaniel attempts to invoke it because of the sexual tension between him and Rebecca when they get stuck in an elevator.
Locked in a Room: Discussed. Paula advises Rebecca to not get stuck in an enclosed space with Nathaniel because attractive people who hate each other getting locked in a room is a common rom-com trope. Of course, it then happens when during an elevator breakdown.