Relationships vs "friends with benefits"

What's this new trend of being "just" riends? So many peopel are doing it nowadays. "Friends with benefits". The "benefits" are usually sexual or, at the very least, emotionally intimate. This serves to blur the line between boyfriend/girlfriend and friend. guess it's a way to get your urges satiated without any entanglements. I think it's not Godly as it violates ethics. Physical intimacy should be within the confines of relationships leading to or already into marriage. If you have NO plans to marry the person, why get physically intimate with them and call it "benefits"? Isn't that the abuse of semantics? I really worry when young christians use this as a means of sexual exploration as the consequences scare me. I've been there so I won't be self-righteous but I don't want anyone to get into the same trap as I have. Hard to get out. Just think long & hard before you start justifying wrong. Later.