When speaking to some New Hampshire high school kids this week, Sen. Barack Obama took the opportunity to fondly reminisce about his youthful ''experimentation'' with drugs. It was a defining moment for many of the students; especially for the stoners who had been taught since elementary school that drugs would fry their brains and ruin their lives. Imagine their surprise when they learned that they were not losers, but rather amateur scientists conducting important research into how much drugs someone had to ingest before they'd turn into a Liberal Democrat.