equipment damage - Is it ok to breathe on the front glass element of a lens to fog it and clean it?

Nikon specifically recommends not breathing on the glass elements to clean them as harmful acids in the breath can damage the coatings on the glass.

However, I've read on many other websites that it is OK to clean the lenses in this manner.

What are the potential pros and cons of doing it?

NOTE: Shortly after this question was posed Nikon removed all references to the issue of breathing on Nikon lenses from the page at the above link.

Answer

Ever since I posted this question here, this has been featured on 2-3 websites:

Although I'm not sure if this was a direct result of posting this question here.

Nikon has now updated the support page and removed the statement where it said that breathing on the glass could damage the lens coatings due to presence of harmful acids in the breath.