No wonder our grandmother has been scratching at imaginary bugs on her arms for the past two days. According to Ed Looney [sic], slot machines are the most addictive form of gambling. It’s tough to think of penny slots as something "highly addictive," considering we take most of our pennies and throw them at bike messengers from the top of our roof, but Looney says otherwise:

The addictive part of gambling revolves around "the anticipation of the outcome of the bet," Looney said. A bettor might have to wait as long as 20 minutes between races at Penn National Race Course. "With slots, they’re doing it in 8 seconds, 12 seconds," Looney said.

What else can be considered highly addictive and be done in as 8 seconds? Hmm… bullriding with Luke Perry? Most definitely. Slots considered most addictive form of gambling [The Patriot Ledger]