Re: While dating…
Humm… I was going to say similar clues and cues. 
If a person (specially woman) comes on second time to coffee place/open place, wears casual clothes rather than fancy ones, acts more natural, order usual meal rather than “first date soup and salad”…will that be a cue the person wants more out of relation? …(Not saying sax!)
Some interested women talk a lot and tell more rather than ask details about the guy. 