Emotional connection can be built in so many ways. Depending on demographics though, the emotional connection technique matters a lot.
If you're sarging cougars and MILFs, try emotional connection through flattery and deep rapport. Deep rapport is simply drilling down into a topic that the woman likes to talk about. Flattery is self explanatory but focus on non-physical qualities more. However, as women age, or the older the woman is, flattering their/her physical qualities work better than some b.s. flattery on their/her non-physical qualities.
If you're sarging the 18 to 24 something age range, build familiarity first through propinquity. Propinquity is simply being seen on a regular basis in girl rich environments. Next, watch for overly emotional reactions from these girls. It could be triggered by a Justin Bieber song or a Jabbawockeez dance move.
In my mall sarges, I get instant emotional connection from girls when I belt out an Aerosmith song (I Don't Wanna Miss a Thing) or a hit from The Calling (Wherever You Will Go). This way, I don't approach or open. Girls approach and open me with a song request usually for a The Red Jumpsuit Apparatus hit song like this one:
[youtube]
http://www.youtube.com/watch?v=Q7Em4fUOrZo[/youtube]
After that, all I do is isolate and f-close.
If you're getting impatient with propinquity techniques, watch for girlie eye cues by firing up some of these emotional hook point topics:
1. toy dogs
2. cute cats or kittens
3. cotton candies or pink balloons
4. Justin Bieber/ Bradd Pitt/ Johnny Depp
When you notice a girl's eyes light up when you mention any of those topics, immediately transition into happy childhood topics like:
a) So when you were a kid, what was the best gift you ever received on Christmas?
b) For you, what was the happiest hangout you had with your best friend/s?
Be careful though in trying to build emotional connection with girls that you have just met or have interacted with for less than an hour or so. Girls find it creepy when you immediately try to build emotional connection when you have just opened them.
I've tried building emotional connection prematurely infield several times and girls ejected at once. I never recovered from those sarges. The girls I've sarged that way treat me like a leper or something every time they see me. So don't make the same mistake.
Only build emotional connection after you have been interacting with the girl for quite some time.

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Approach. Open. Escalate. Isolate
Here are my two essential rules on texting that will save you tons of time and money:
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