Re: my sister...
If you want to talk to her, discuss (not in detail) your experience with porn (if you've watched it), and discuss the consequences, but don't sensationalize things and don't make it seem like you're invading her privacy too much... Pretend you accidentally stumbled upon it and that you weren't actually searching her history. Just don't say, "If you get caught mom and dad are going to kill you", or "You could get in really big trouble", just tell her to watch out and be careful about what she looks at. Its her life and its her choice.
I'm way too high (too high too high)
To be feeling this dry and low
I'm way too tired, I've tried
I'm fired up and ready to roll