A Casual Relationship, mostly commonly called Friends With Benefits, and also known as a No Strings Attached (NSA), is a friendship that includes sex, sexual activity, and sexual intimacy. They consider their bond to be no more than friends just with occasional casual sex involved.
History
The term 'friends with benefits' is speculated to have first been used by Alanis Morissette for her 1995 song “Head over Feet”, although in the original context it seems to refer to a committed rather than a casual relationship. Since then, the term has been used to describe what it is now today.
Flag
The casual relationship flag was coined by Tumblr user Nonmonoprideflags on or before January 24th, 2018.