Lots of difference between erotica and porn. I enjoy looking at a beautiful woman sans clothing as much as the next male. What i am referring to is some video of a woman having intercourse with three males (won’t call them men) simultaneously. You figure out the logistics. That is porn and it is pure degradation.
Maybe marijuana is not a gateway drug for you but it is for many. Maybe Playboy is not a gateway drug for you but it is for many.
The biggest problem is the pushing of the envelope. I remember porn films in college and they almost all had rape scenes where the woman discovers that she loves to be raped.
I never got the whole fascination with “Wow, look at the guy who isn’t me having sex”.