The guy's imagination is not taken away. Waited for the girls to watch a horror movie and then came over and fucked each one in turn. When you wake up and see a mask, you involuntarily increase your state of fear. And this adds a twist to sex, more hormones are released, including adrenaline. it is possible that such tricks he and his sister and girlfriend will do regularly.
When the huge black phallus enters her pussy, the white chick feels euphoric about what is happening. Her opinion of herself rises to the sky. Getting a big negro to get on top of her is a reason to be proud in front of her girlfriends!