People have become so dependent on technology that they don't know how to communicate with prospective dates other than through the cold touch of a keyboard.
In contrast, there were significant differences if the topic was meaningful.
If a guy is out with a girl and wants to show her how he feels, a high five is not the way to go. A high five from a guy could result in a slap in a face from a girl, or worse, no second date to redeem yourself.
Even if you aren't ready for a kiss, do not high five a girl. If you've been going out with someone for at least a couple of dates, you owe them a phone call.
How long should you wait before responding to a text or phone call? The idea that you have to play hard-to-get is junk-food.
If you begin a relationship by playing games of any kind, you will ultimately lose.