If one partner gives himself completely, he breaks down the barriers of the other, however strong they may be. Because the act of giving means: "I trust you". The other, who to begin with may feel rather intimidated, wanting to prove things which aren't even under discussion, is unarmed by the spontaneity of such an attitude, and relaxes. At that moment, true sexual energy comes into play.
It isn't the desire to abide by the law that makes everyone behave as society requires, but the fear of punishment. Each one of us carries a gallows inside us.
Each human being is unique, each with their own qualities, instincts, forms of pleasure, and desire for adventure. However, society always imposes on us a collective ways of behaving, and people never stop to wonder why they should behave like that. They just accept it, the way typists accepted the fact that the QWERTY keyboard was the best possible one. Have you ever met anyone is your entire life who asked why the hands of a clock should go in one particular direction and not the other?
I see is that there are many people who destroy their marriages because of one-night stands with someone else. And as the French say, "C'est ne pas grave." It's not something easy to swallow, but at the same time, it does not justify you to end a long-lasting relationship because something happened.
Never miss an opportunity to show your love, especially to those close to you, because we are always at our most cautious with them for fear of being hurt.