Explanation of this mindset: Think about all the movies, TV shows and songs you've heard over the years, and how they've affected your psyche. Most of them have brainwashed you into thinking a woman WANTS to see you everyday; therefore, you MUST reach out to her at all times.
Want proof? Here are some sample lyrics from Justin Timberlake's "Not a Bad Thing":
Said all I want from you
Is to see you tomorrow
And every tomorrow
Maybe you'll let me borrow, your heart
And is it too much to ask for every Sunday?
An while we're at it throw in every other day to start
So, a guy hears this on the radio 75,000+ times a day. And what's the message being conveyed? "A girl wants to see you all the time... every single day, she needs to see you to feel loved." And this is just one song - the majority of songs on the radio convey this same message.
Then, there's the movies and TV shows. Think of how many scenes you've seen where, at the end of a date, the guy turns to the girl and says "So... I had a great time. Can I see you again tomorrow? I'll call you when I get home..." Now, for purposes of TV and movie, the girl is scripted to say "sure, I'd love that" in response to this guy's request. As your own dating life has probably taught you, though, the actual response - i.e. her not picking up your call/text or wanting to see you again - is not very favorable. And logically, you probably know this. But, your subconscious can't really tell the difference between what's real and what's scripted. So, when you see these things in movies and on TV, your brain thinks "Yeah, if I want a girl to like me, I definitely have to set up a date while on the date and let her know I'm going to contact her so she'll be assured of my like for her and won't try to date anyone else!"
So, that's the reasoning behind why you feel that way. As those of us on the board with more experience can attest to, though, it's actually BETTER for you to show some restraint and be more patient. I started getting WAY better results with women when I changed my mind frame to waiting 4 days after a date before contacting them. What I found was two things: one, my retention rate for 2nd dates increased dramatically; and two, usually by the 2nd or 3rd day, THEY would be hitting ME up with a "check in" text that would result in me being able to set up another date with them. So, you definitely want to get to the point where you can do this - TRUST me, your dating life will change for the better if you can delay calling them so quickly between dates. Hope this helps!