"...a sign of good fortune. That's a new one." A devil's mark had been the more common accusation. 'What's wrong with your hair?' 'Are you sick?'

Time for the generic warning, "In my world, there are humans who... have been changed. Some people say they're the next step in human evolution; others say that they're monsters an' need to be destroyed. The one thing that's common with mutants is that they have somethin' that sets them apart from other humans. Maybe it's the way they look, or maybe it's an ability of some kind. Super strength, super hearing... the ability to read minds... teleport. Things like that."