Most Helpful Guy
HE wants you for sex , when he asks your name while putting down his pants.
Its hard to tell, as the pros hide their games well if he's a borderline opportunist, and not so well is its a HOT guy that has lots of opportunity ,
Only sure way , make him wait , a guy won't stick around for very long if he knows he won't get lucky unless he shows the commitment of time.
Most Helpful Girl
Ummm, pretty much if a guy is talking regularly to a girl, he'll desire her for sex. Now the difference is if he wants to just get laid, or if he's really into the girl. If he's into you, then he'll put in the effort to show that he genuinely cares for you, will commit to a relationship with you.