'Fiddling' - (via Facebook)
A desired level of discreet,underground non-flirtatious sickingly flirtatious private messaging behaivour desired via FaceBook !
As in secretly, (even to themselves),'doing each other' with an intellectual dildo.
See FED: 'Giving each other great FED, ('head’ via Face book!)
Or See 'Facehooking'
The practice of selling oneself sexually / intellectually and anonymously via means of on line chat.