Awkward moment: I caught my uncle touching himself while looking at my facebook pic. Should I confront him?

[H]

My uncle is here to visit us for a few months. I took a pic with him a few days ago and we both set it as our facebook profile pic.

http://i951.photobucket.com/albums/ad351...5550-1.jpg

We used to really close and he was my favorite uncle so I missed him a lot. Anyway earlier my mom asked me to tell him to come out of the guest room for dinner so I barged into his room without knocking and it terrified me. He had his pants down and the pic of me and him is up on his laptop screen and he was touching himself. Super awkward I know!!! I only caught a quick glance before turning away. It was awkward throughout the whole meal. Should I be worried? Should I confront him about it?
@king: isn't that kinda melodramatic?
@mdm: I know but its just...I didn't expect that at all
@derrick: that's what i hope. i hope it's gonna blow over and he's gonna move out and everything will be fine, but i'm still scared