Nameless, random, uncommitted sex is never safe. Not emotionally, not spiritually, not physically. In fact, no sex is safe. Sex is not supposed to be safe. Sex isn’t supposed to be physically perilous like it often is these days — thanks, mostly, to years of ‘safe sex’ education — but it is supposed to be an act of great depth and consequence. Sex is meant to be open and exposed. It’s meant to bring out scary and mysterious feelings of desire and devotion.
Call that whatever you like, but you can’t call it safe.