ugh, well during my awkward puberty stage (12 years old) when the internet was starting to be more common place, I used to look at porn on my family computer while my parents weren't home and I would print off the pictures... remember this is when vids on the net were only 30 seconds long and there wasn't a such website as xtube or pornmd. So pictures had to suffice. But, I printed off tons of pictures and hid them in my room.
Unfortunately, my parents being the nosey people that they are found those pictures and confronted me with them. I was able to say that I was "curious" even though I knew exactly what I was doing and why. This incident happened again a year later and once again, I said I was "curious".
Another incident when I was in college, my stupid roommates decided to snoop on my computer and looked at my history. I remember them finding the website Workingmenmovies and asking me why I was looking at gay porn... I talked my way out of that one. My life was that I have a gay friend back at home who borrowed my computer the week prior (we'd just started the semester so it was highly likely).
I'm out of the closet now, so if someone finds any porn on my computer, they shouldn't be surprised now.