He thinks he can hide them on the computer by changing the extentions.Kids are pretty resourceful at getting what they want. Remember we all were like that at some point.. Remember the days you would sneak into your dads stash of playboys.
ive got all my porn hidden in a HIDDEN folder, inside a folder, inside another folder, in some random program and then i only view it useing kazaa that is also hidden. yes im that paranoid.
my dad has one of his porn stashes hidden in a seacet pannel he built above the bathroom closet. they were doing some remodleing one time when i was younger and i noticed that the bathroom cieling was higher then the closet cieling HMMMMMMMMMMmmmmmmmmmm
i had some videos one time a friend had loaned me and i was useing one of my dads old hideing places, a vent in the floor that went no where but a empty carpted pipe

thats about as long as my arm, my mom caught me with my whole arm in there that time.
then one time when i was about 13 i was sneaking his porn videos out from under one of the beds (another seceret compartment in the bed frame) in one of our guest bed rooms. little did i know that he had the same idea as i did at the same time, i got caught with my hand in the cookie jar, again. hell if i can find where hes hidden them this time and ive been looken for nearly 6 years.
hes got a TON of seceret hiden places around this house, its not unusual for me to find one of his old ones every now and then. right now hes building a "hidden" room for our guns, it used to be a storage room in the basement thats big enough to fit about 4 or 5 cars in side by side, he cut the room in half and put up a fake wall. in one of the lounges hes putting in a fireplace with book shelves, to get in to the gun room you will have to go in to the part of the storage room thats still used as a storage room and turn 2 dead bolts with keys, then you will be able to slide the back of the fireplace over and crawl under the mantel.