Pornography can become a problem, like anything, when it's denied to an individual in this way.

If we started treating sex as something natural, the way it truly is, we'd see people become more honest and open about their desires.

The problem lies in denying something so natural to human beings.

When the world tells people that pornography and sex are bad and sinful, people start seeking them out in unhealthy ways, consumed by guilt.
It's like a mother who denies her child candy; the child can grow up frustrated and with an unhealthy relationship with sweets, thanks to guilt.