Stuff my family says.... Hookah

My sister and her BF love hookah.  I have never come to understand the draw of this.  Funky flavored tobacco out of what looks like a spaceship/bong?  Not so much.

So the other day my sister and her bf were doing their hookah thing, and my mom and I were sitting there chatting with them... The following is the conversation that ensued:

Mom:  "How do you do this?!"

Sister: "You have to make it bubble..."

Mom- "ooooh.... like farts in water...?"

At which point my sister's BF does whatever you call it... smoking? taking a hit?  Yeah I clearly don't know anything about Hookah...

Mom: "WOW Tom, that's like a hot tub!  That's a lot of fart!"