Psychology of Porn Questions?

Is there something wrong with me psychologically if i get aroused by porn that overtly degrades the woman. Throughout the day i'm a really nice, personable, friendly individual, but i feel like i have this dark side to my personality. Do guys who like rough porn have some kind of abuse in their childhood. Could i have been sexually abused as a kid but my conscious psyche is repressing it, but then releases it in this type of activity (namely getting off to aggressive/degrading porn) thanks!