Hmm, that I don't agree with the Total Recall bit....it could be just out of politeness as friends to ask follow up questions or because there's otherwise a lack of convo between them.
I think we girls do give a lot of hints on dates..or show signs...part of it might be unconsciously but i think you can read if a girl likes u or not by the way she moves & talks... I do find myself behaving different towards guys im into and guys im not into i guess...
Some is Agree. especially the "Limited interruptions", I don't interrupt people when they're talking because I find it rude or sometimes I just don't know what they're talking about XD.