He went to the OFO.
Heric. "Obstacle Free Oral". I'll drop in a heartbeat as long as I don't have to part the hanging gardens of Babylon to get there. The best oral, is obstacle free oral. No muss. No fuss."
Jim. "Amen brother"
In addition to the usual feminine or masculine visual signifiers of butch/femme relationships (clothing for example), OFOS couples embrace old fashioned social behaviors such as chivalry, etiquette and courtship rituals.