Instead of just giving her oral sex, start off slow by kissing the inside of her thighs, inching closer and closer. Create expectation. Make her yearn for whatever you’re about to do to her. Stuff like this drives girls crazy and makes them incredibly horny. If you do this well and repeatedly, you’ll often get girls pushing you down and forcing you to have sex. The expectation is too much. They have to have it. Right then and there.