False time constraints are used when developing game so that you don't come across as imposing yourself on girls. Many times women report that creepy or annoying guys will walk up to them and talk and they won't leave, even when conversation gets dull, even after being given a few hints to leave.
When you get better at game and you know the conversation will go well even before you approach you can drop the time constraint in most cases.
There is another big use for false time constraints which even pros can make use of. People will always want what they can't have and the greatest gift you can give a girl is the gift of missing you. When you go into a conversation with a false time constraint you install the fear of losing you too soon.
When in conversation and things are going good you use the false time contraint to fall away and force the girl to pull you back. Nothing is as satisfying as having the girls pulling at you to prevent you from leaving
Which brings me to the other subject of leaving in the middle of having fun. You will always remember a meal by it's last bite, and the same thing goes towards interaction. A BIG secret to hooking girls so that you can easily meet up with them some other time is to break the interaction at the HIGH point, not the low. This counter-intuitive idea is what makes it so unique.
What happens is you install the latest memory of you two having lots of fun, and the next time you meet up you will begin from that same moment of extreme fun. This is EXTREMELY effective and can be easily used to get girl very excited about you and have them coming back to you for more.
Remember always leave them wanting more. More to come soon.
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http://www.solomonseagal.com
Anyone can walk into a bar and pick up a random girl.
The trick is to make the experience unforgettable to her.
A real PUA will make every women he encounters feel like she experience something once in a lifetime.