Let the person know it is VERY addictive...it's a moral obligation. My first time was after having already done acid, pot, shrooms, opium and coke, so I was like ok this should be descent. Then...WHAM!!! It was way more eurphoric than anything I had ever done or anything I've done since. I wasn't ready for how good it was and was instantly addicted, so I'd say just let the person know it's not some "background shit".