Mike Manzi, 32, wants to spend a Sunday afternoon chilling with a 13-year-old girl after texting her about getting stoned. But Manzi's date is about to go up in smoke.

Manzi is a math tutor. He teaches some of New York's wealthiest children how to solve complicated equations.

But you might say Manzi flunked basic arithmetic, because 32 plus 13 adds up to trouble.