Using a bong when smoking is used to filter out crap and cool the smoke. Since there is no combustion involved in vaping, there is nothing bad to filter out. Yes vaping by itself will be much cooler and easier on the lungs and throat compared to smoking. However, the vapor is still warm (usually around 350-400F) and can cause irritation for people with very sensitive lungs or throat. For example, a person with asthma will possibly be able to dry vape but it still may be uncomfortable for them. If you vape through water, the vapor is significantly cooled even more and becomes much more tolerable for people with these types of conditions.
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There most definitely is. One sec I'll show you //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif