Complex sentence: Nostril piercing has in recent decades become popular in the industrialized nations, as have other forms of body piercing, after punks and subsequent youth cultures in the'80s and' 90s adopted this sort of piercing.
Split into simpler sentences: Nostril piercing has in recent decades become popular in the industrialized nations, as have other forms of body piercing. Afterward, punks and subsequent youth cultures in the'80s and' 90s adopted this sort of piercing.