Porn isn't neccessarily bad, but there's different opinions.
Personally, I think it's fine if 1) it's good quality
2) you aren't in any chats and 3) not signing up with any memberships.
That guy sounds like a weirdo tho
There's many people worried that they're addicted or may become addicted to porn. Don't worry about that tho, as long as you have a life outside of porn, you aren't gonna be talking about sex or porn that much!
Just keep playing sports, watching TV, staying active, getting ok grades, and having a good social life. Those things are a sure-fire way to prevent you from getting any sort of addiction!
Tho, I don't exactly promote porn because we're underage and this is an underage site under a network...