Both in the context of getting "high" and autoerotic asphysxiation.
The "high" is a tingly, floating experience. It's a free way to get high, it's relatively easy to do, and kids arent always capable of understanding the risks.
During sex, it's supposed to give awesome orgasms. The ultimate pursuit of pleasure, I guess.
I've seen a few patients on psych wards as a result of this.
\t