You can see that the girl wants to, but as I understand it - her mother did not often let her go to parties. Slim and pretty, she wants to have sex and get off like a grown-up! And the guy's got a big dick, and he handles it like a man. The little sweetheart's got a hard-on. But she's riding his dick with gusto. I'm telling you, she's got potential. At the end of it, she's getting fucked in the ass! She's just twitching in ecstasy.
Negroes, mulattoes like to spank white girls in all holes. The fact that this brunette is also a charming girl - gives a glamour to what is going on. And he's just using her as a device to jerk off his dick and lick his balls. He uses it and then he flushes it. And she's satisfied.