Pink Glasses Asked: Should I tell my brother how to delete his porn computer history?

I went on my older brothers computer that is 16 (I am 13 by the way) and when I wanted to type in youtube, after the first three letters you**** was the website that appeared. I checked his computer history and it was filled with porn. I think its gross but he is 16 and I know that most 16 year old boys watch porn. I understand that since he is 16 and his hormones are going crazy right now that he wants to watch porn. But I am scared my parents will eventually go on his computer and figure it out. I deleted all of his history so that they cannot see the history and I also deleted the suggestions under the search bar on the url and yahoo answers search bar. I want to remind him that he has to delete his history and show him how to delete yahoo search bar related searches because I do not want him to get caught. If I tell him though he will be embarrassed that I have know for a long time what he has been doing. Also he would be ashamed if my parents knew because they would look at him as if he had an extremely dirty mind and he would also be ashamed if anybody else including me knew/ Should I tell him how to delete any type of history that my parents could find about porn. Also, I have hit puberty earlier than most girls and I also have sexual feeling for people so I understand that he has sexual feelings too.