I presume you mean Pornography - usually shortened to Porno !
It is very unnatural sexual activity between people sometimes of the same sex and often of opposite sexes - either way it is very wrong for anyone to indulge in watching porno if they ever hope to develop a great sexual relationship for the rest of their life.
God created us and sex for us to enjoy but only between one man and one woman once married and for life and for pro-creation of the human race!!