You don't?

[Oh...oh that was precious. It took a concerted effort of will on Kerra's part not to laugh, and it was successful. She did crack a smile though.]

It's a hookah. Kinda like a waterpipe, but pretty much just water vapor.

[Rolling forward, Kerra reached for the hose, tugging it closer. If this was what interested her, then why not give it a shot. It wasn't like it was all that bad.]

Here, let's give it a shot. It feels pretty nice, all things considered.