Stanley and the Narrator are like best buds that fuck sometimes for relaxation. Maybe they got a promised wedding by 35 if neither are married.
Chell and GLaDOS are hate fucking. They sending each other death threats while touching themselves. They ruin each other’s other relationships because they think the other should be miserable with them. But they always cuddle after the fucking and try not to think about what that means when they feel safe while around each other