It's impossible to weigh the pros and cons of most things, porn included. I could easily think of 10 different ways it could affect someone's sex life either negatively or positively. To answer your other two questions, you can have a compulsive behaviour that negatively affects your life, which is what most people would call an addiction. Search wikipedia for Psychological_addiction#Behavioral_addiction to get some more details.
By: Gerstenberger
+178reps
would suck on those things for hours
By: Vrias
+37reps
the guy is impotent.
By: Wiley
+33reps
hm lecker
By: Eugene
+134reps
You are one lucky guy to have a neighbor as her, I'd love to be wearing her hot panties as she sucked me like that ?