British psychologist David Smallwood argues (unconvincingly) that increasing numbers of women are addicted to gathering friends on facebook. He calls this “friendship addiction,” and he estimates that 10 percent of women suffer from the disorder. I’m all for a broad definition of addiction (and I can attest to facebook’s addictive quality), but I find it amusing how “experts” will throw out a number (5 percent, 10 percent, 20 percent) based on nothing.