A Google Search shows that the evidence isn't as strong, but i would say that if smoke brings water to your eyes, why should your lungs like it better? There are better ways to relax and unwind.
Disclaimer: Please see your own dentist/doctor for a proper diagnosis as my words should not, in any circumstances, be taken as dental/medical advice.
"If you see what is small as it sees itself, and accept what is weak for what strength it has, and use what is dim for the light it gives, then all will go well. This is called Acting Naturally." Lao-Tsu, Tao Teh King
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