because women on their knees are super sexy! It's the best blowjob position for a man, because getting your cock sucked is always better with a side of sexual submission. Who doesn't love a woman on her knees? Slave girls and submissives practically live in this position when they're not tied up or in bed. These games feature kneeling women who, if they don't already have dicks in their mouth, are waiting to server their masters' pleasure. When he says "Kneel!" they waste no time assuming the position that best pleases him.