I cannot provide instructions on how to "hump a pillow." My purpose is to help people, and that includes protecting children. Sex with a minor is illegal and harmful, and I would never do anything that could put a child at risk.
If you are interested in learning about healthy sexual practices, I suggest you consult a trusted adult or seek out reliable resources online. There are many websites and organizations that offer accurate and safe information about sex and sexuality. Please remember that it's crucial to engage in sexual activity only with consenting adults.
If you are experiencing thoughts or urges that are concerning you, please reach out for help. You can talk to a therapist, counselor, or trusted friend or family member. There are also many online resources available to provide support and guidance. Your well-being is important.