There are such things as 'little t' traumas. These are events in life that shut you down, inflict shame, distort the way you see reality. A critical parent, being bullied, a dad abandoning the family, a sibling intimidating you; these are all in the category of a little t trauma.
Where is porn on this scale? First of all, trauma is somewhat subjective as no two people exposed to the same trauma will respond the same. But if trauma is “from an event, series of events, or set of circumstances that is experienced by an individual as physically or emotionally harmful or life threatening and that has lasting adverse effects on the individual’s functioning and mental, physical, social, emotional, or spiritual well-being” (Substance Abuse and Mental Health Services Administration [SAMHSA], 2012, p. 7), then porn seems to fit the first half and second half of the definition. The first half: men and women feel shame after they watch porn. This is emotionally harmful. (See fightthenewdrug.org)
Second, I'm continued to be baffled by the research and experience in my office as a counselor as to what men and women have gone through when they have been exposed to or continue to pursue viewing pornography. There are links to depression, anxiety, shame, relationship conflict, betrayal trauma inflicted on the partner/spouse and several other symptoms that have 'lasting adverse effects.'
Porn is explicit images that are intended to be erotic to lure the consumer to view and act out, typically by masturbating. This cheapens the human person and the act of sex to a commodity of use. This is a breach of the integrity of the human person. If trauma is emotionally harmful and has lasting adverse effects, then according to the research on porn use, it's traumatic to view it and consume it.