I don't do friend requests. Nevertheless, I do consider you a friend so don't take that personally at all. It's really more of a way to maintain profile privacy and my own sense of organization about what information is (and is not) displayed.
You need to try it at least once hehe, it's gross and quite expensive. But everytime I try it, I imagine as if I'm chewing lipstick, and I have tasted lipstick which has affected my experience with people putting it on.