IMHO...
Bongs are the most disgusting dirty health hazard to anyone sucking on one.
Our lungs are not built to handle water vapor...you are effectively drowning yourself by degrees every time you pull a cone.
I have used bongs and my lungs react with disgust as I cough so savagely I have to support myself till the spasm ends.
This is how my body reacts and my opinion of them.
Your mileage may vary.