I tried to talk to him. Actually several days earlier when I found he did similar things - going online and reading articles about sex, I had a talk with him. I told him it was normal to be curious about sex. I told him he could come to me with any questions. Another phrase he searched was "I am a rape victim". He did tell me he heard it from an older friend (13 years old). It seems that he has been reading articles for a while.
Should I make an appointment with a psychologist for my son?
I didn't see other related behaviors besides reading articles. My son only plays with boys, usually older than his age.
So you are saying I don't need to "freak out"?