It's time for another installment of Pot Psychology, the "advice" column in which we attempt to solve everyone's problems with an herbal remedy. (Remember, kids: Don't do drugs!) In this episode, Rich, the Feldman to my Haim, helps me answer questions about Craigslist hookups, sleeping with siblings of friends, and ex sex. Got a burning question? Send it to potpsych@jezebel.com. (Please keep them short; they're verrrry hard to read when stoned.)