The root of all sexual evil

At the very least, sex needs to be an act that is respectful and giving. But consider masturbation. Masturbation is inherently an act that says: I'm seeking sexual pleasure for my own benefit. This immediately turns us in the wrong direction, and if we keep doing it, we acquire the habit of seeking sexual pleasure for our own gratification. This can very easily transfer over to sex, so that sex then becomes an act of taking, rather than giving, and is only respectful as long as one is respecting the other's ability to give pleasure. In other words, masturbation sets the precedent of seeking personal gratification, which can easily become the use of others to reach that gratification. It could very well be that masturbation is the root of all the sexual dysfunction a person can encounter.