I absolutely LOVE that movie. It's one of the best ones I've ever seen and it just so happens to have his penis in it. But if you ever want to read more about the character he plays (Bronson) you can find his books on Amazon.
Bronson: Loonology
The Good Prison Guide
Insanity: My Mad Life
Solitary Fitness
Ninja edit: A small interview with Tom on the phone with Charlie