His girlfriend is drunk. She is just lying on the bed. She is so drunk that she does not know what is happening. But her boyfriend thinks that this is the most exciting part. She drinks too much and she cannot even take off the clothes herself. So, her boyfriend just does it. He does it really slowly. He takes off her jeans slowly first. Then he tries to take off her t-shirt. Right, he is not in a hurry. He does not need to do it fast. When he is penetrating her, it seems that she wakes up a little bit. So they just change to doggy style.