Never. My family aren't big on hugs. My friends always try to hug me for stupid reasons ("Oh my God, I haven't seen you for like 20 minutes! HUG!"). I just stand there limply and take it. Unless I really, really like you, and you really, really deserve it, I rarely instigate a hug. A hug actually means something to me. I don't just do it for the sake of it.