How common is it for a doctor to hit on his or her patients?

I realize doctors have ethical rules against dating patients, but just how common is it for a doctor to flirt, hit on, and ask out a patient? How common is it for a doctor to date medical staff? Which medical staff tends to date doctors most often (ex, other doctors, RN's, medical assistants, phlebotomists...). Can the relationship between a doctor and a patient ever work out? If you are a doctor, what is your experience with this and what are the stories you have heard and can share here. Thanks.|||Not too common because flirting can lose them their job.