Smoking Nurses

How can anyone want to be a nurse without trying to be an example of healthy living? I noticed that roughly 60% of the people in my nursing courses smoke!! Does this make any sense? Being a fat nurse is one thing... but smoking! Come on! Holistics class assigned us student nurses to start one healthy habit ( I gave up soda pop) in order to move more toward a picture of health. NO ONE gave up smoking. People are dumb. Someone who doesnt follow health advice has no right giving it out, is all I'm saying..