Straightedge. It has the same basic principle (no drink, no drugs, no fuck) for all followers, but each person makes it their own. Some examples: some sXe people choose to be vegans or vegetarians, abstain from caffeine, save sex for marriage (as opposed to a serious, committed relationship). Straightedge has NOTHING to do with violence (in fact, most straightedgers discourage it) or religion (that's a personal belief). Some people say that taking medications is not
straightedge, however, others will argue that sXe is all about taking care of yourself, and refusing legitimate medications is
counter-productive to the general ideology.