I don't think everyone who smokes necessarily stinks of it all day, but they do stink of it for up to half an hour after having a cigarette. They won't admit this, but it lingers in their hair and on their clothes for a while. (And on their breath VOM. ) 
So if you are a smoker who smokes one an hour (or more!) like some smokers do, then I'm sorry to tell you this, but you will stink of smoke all the time.
I was gobsmacked to hear someone announce that smoking doesn't harm kids if you smoke around them, because it apparently didn't harm them when their parents smoked around THEM... It's a well documented fact and has been PROVEN time and time again, that smoking around your children, AND smoking when you're pregnant will cause harm and health problems in your children. And it does. They are much more likely than children of NON smoking parents to suffer......
Glue ear,
Asthma,
Bronchitis,
Other respiratory problems,
And middle ear disease,
And they are more prone to infections and illnesses. They also have a greater risk of getting lung cancer as their lungs are still developing.
They are also more likely to have learning problems, and attention-deficit/hyperactivity disorder, and they have a higher chance of sudden infant death syndrome. It's breathtakingly ignorant and plain dangerous to suggest 'kids will be fine' if you smoke around them.
Do you know many adoption agencies won't allow you to adopt a child if you smoke?! Why do you think that is? It's not because they don't like people who smoke; it's because it's a foul, unpleasant, habit, that affects other people, and will DEFINITELY affect children if you are stupid and ignorant enough to smoke around them.
For your reading pleasure. READ, and educate yourselves FFS!
www.healthychildren.org/English/health-issues/conditions/tobacco/Pages/Dangers-of-Secondhand-Smoke.aspx
@Chardonnaysprettysister
Sometimes I can tell someone is pregnant just by the smell.
Just when I thought I'd heard everything on mumsnet! 