Does Tit for Tat really work?

Does the saying "Tit for Tat" really make sense? Do you really give an eye for an eye in other words? For every action, there has to be and there will be a reaction. But should the reaction be the same as action?

If a person A behaves in a certain manner with person B, should person B also behave with person A in a similar manner? Is a slap really the right way to respond to another slap?
I think - Tit for Tat must have first been said by a person who was mad with anger, and had only revenge on his mind. Tit for Tat, according to me, cannot be a wise reaction, not something you really want to do in life. Yes - I believe, there are many occasions in our day-to-day lives when you react that way - you want to just do what the other person did to you. However, in the end, you will only realize that - hey, when did I become like that person? Why did I start thinking that way?

There isn't really a Tit for Tat. I firmly believe that everyone should be what they are. The more you try to be like another person, the more you try and give it back to people, whatever they give to you, the more you are losing your individuality and every little thing that makes you, that defines you.

A Tit for Tat may seem good initially, but in the end, it will only make you feel bad - not really for the other person, but more so for you yourself. Be yourself, do what you believe in, without really worrying too much about what people feel, or whether they appreciate it, or value it, or like it. Perhaps a few people won't like you for the way you are, but at least you will be at peace with yourself.