I know it's like an open game, and other pro's have played, but I want to understand the logic of that.

Explanation 1. ... e5: see explanation 1. e4.

Read "Logical Chess, Move by Move" by Chernev.

Wait, didn't I give you this advice before?

If you're serious about these questions or getting better at chess, you'll read that book. If you're not, will you stop wasting everyone's time?

Just read the Wikipedia article on Chess Openings - free explanations but still quite good.

If you don't know why to play e5, then you probably don't know why to play e4 as White, either. Oui?

Something along the lines of "Logical Chess", "Complete Book of Chess Strategy" by Jeremy Silman, or a cruise through the recommended books section of this forum should do wonders.

You play 1...e5 to control the d4 and f4 squares and open the f8-a3 diagonal for the f8-bishop. Simple as that.

Then 2.Nf3 is White's best reply. To find out more on why 2.Nf3 is the best move, I again refer you to Wikipedia. If 2...f6?, 3.Ne5! is much better for White.

Just to clarify, you don't "control d4 and f4". You just influence it or put a force of one on d4 and one on f4. If you control it, that means you own it and that's clearly not true. White can play 2.d4 (I'm not saying it's good or not, just pointing out that if Black owned d4, then White could not safely play it).

There is actually a lot going on by playing 1..e5.

Bela

Go here read and learn:
Chess Openings

One of the most common opening moves for White is 1.e4. It seems that Black often has difficulty with choosing a system against it. Here I would like to look at the broad choices available.

First I want to make some assumptions. One is that if White is allowed, he will want to play 2.d4. Another is that most often both sides castle king side so we will assume this is where the kings will reside. We will also not concern ourselves with gambit play at this time. Lastly, the assumption is that both sides will play opening moves that conform to the basic goals we have outlined before. Those are:
1. Increase Center Force (CF)
2. Increase Total Mobility (TM)
3. Help with king safety
4. Attack/create/defend targets
5. Hinder the opponent from doing the first four as much as possible
6. Do more than one of the previous five if possible

The first thing to note after 1.e4 is that White now has a new target: the Pe4. Black has a choice of either 1) attacking it 2) ignoring it or 3) both. Let’s take a look at all these options.

1) Attacking It

It can be directly attacked in one move by 3 choices: 1..d5; 1..Nf6; and 1..f5 (let us not consider gambit play so we will ignore 1..f5).

It can be attacked in two moves by: 1..e6 2..d5; 1..c6 2..d5; 1..d6 2..Nf6; and 1..b6 2..Bb7. (I suppose we can come up with some other ideas like 1..e6 2..f5 or 1..g6 2..f5 or 1..e5/e6 2..Qh4 but I will leave these for some other time.)

2) Ignoring It

Black may choose to ignore the White Pe4 for the moment and get on with other opening goals such as 1..e5; 1..c5; 1..g6; 1..Nc6; another might include d6 & c6.

The two most popular by far are 1..e5 and 1..c5. Notice that 1..e5 now gives White a target but 1..c5 does not. But, 1..c5 only increases TM from 20 to 22. Pros and cons abound.

3) Both

Some ways of doing both include 1.e4 e5 2.Nf3 Nf6 (ignore then attack) or 1.e4 Nc6 2.d4 d5.

All of these systems have pros and cons.

Notice that the 1) Attacking It systems are generally light square systems while 2) Ignoring It systems are dark square systems.

This has significance because since the kings will go kingside (Black’s king starts on a light square [e8] and goes to a light square [g8] so is therefore sensitive to light square attacks), light square play by Black generally makes his king safer from attack than dark square play.

Bela

In traditional Chess, whether in the West, or Russia the idea is rapid development. The idea of rapid development is also an attempt to gain a tempo. The idea of answering 1. e4 e5 is that it is a Classical style of playing which suited Steinitz, Lasker, Capablanca, Botvinnik, Reshevsky, Spassky, Tal and many more old and modern GMs. And do not leave out Keres.
Fine at the AVRO in 1938, the last great Tournament before WWII answered every game with 1.e4 with 1.-; e5. By the way he finished tied for first place.
The idea of 1-; e5 is a matter of style. But in the GM realm, GMs switch Openings from time to time. So they may go with the Ruy Lopez, and 6 months later with the Caro-Kann, Sicilian Defence. Some play the French.
In yesterday's chess world it was a matter of study, keeping ideas in notebooks or index cards, and if a Russian GM having a second who prepared Opening work. Note that Alekhine indicated never copy GM moves, or memorize moves without knowing the ideas behind the moves.