What can I do to prevent it from heating up? Even if I use a non-latex condom, it still causes this sensation.

To avoid irritation during sex, it is important to use a water-based lubricant and avoid condoms with flavors, fragrances, or spermicides that can worsen the situation. It is also important to consider the pH of your partner's semen, as this can contribute to irritation. If you experience a burning sensation when urinating, it is important to consult a healthcare professional for further evaluation and treatment.