The worst kind of peer pressure:

While rummaging through a cupboard, I found a bag of catnip. If you've never seen catnip before, it looks a lot like oregano... which (I hear) looks a lot like something else. I handed the bag to John, who regarded me with arched eyebrows, until I suggested that he refill some of the cat toys. He immediately walked into the family room, where all four cats were feigning aloofness, and asked, "Who wants to be cool?"