What its called when your texting and u say that ur like moaning and saying ur doing sexual things?

My boyfriend cheated on me -.- and they were doing this back and forth on facebook this was back in December but were still together, today is our 9 month, if anyone cares :l but i was talking to my friend about it and i think he said it was called something like the 8 stars or something...? anyone have a clue, not sexting i know about that. but is it like the 8 stars? does anyone know? just curious. They were like narrating their sex..