Discovered my 10 yr old son is searching up porn. How do I talk to him about this?

His father and I are not together and I’d like to involve him in on this talk but I want to get some advice first before I do so. I didn’t think I would come across this issue until he was older. Now that I’m here, I’m at a loss. I want him to feel comfortable with his sexuality and the changes in his body but I don’t want to make this an awkward talk. What are some tips some of you can give me to help make this talk a lot easier? via /r/Parenting http://bit.ly/2EUKTUK