sometimes it will help the snake relieve itself, but usually people may soak their tropical snakes, usually not ball pythons. I will soak my brazilian rainbow boa when I need to, but we had a tough winter with really low humidity, and even with a humidifier we had problems. but back to your question, its not really necessary to soak a bp unless there's a stuck shed, or unless humidity is low and you want to proactively soak them in moderation when they go blue to try and avoid problems