As for denial, milking, safety. I think as with anything else it varies. What is safe for one, may not be safe for another. Talking to one's doctor, is a great idea.
For some the "risks" are what intensifies the excitement, you take away the risks and its not as intriguing for them. So you both have to decide whether or not you want the risks involved or not. That is why breathplay is so popular with many, the risk is there, taking that risk increases the high, intensifies the experience.
