I looked through your questions and kind of content with what I found, but I want to support you guys and ask myself anyway - so take my 25!

I think I know the answer to this (which I think is pretty much a no risk type of encounter) 
Hung out with a guy, chill- Just wanted to masturbate together and just do hand jobs. Easy risk free fun. We've hung out before so I trusted him.
Then he got too into it and suddenly went down and licked the tip of penis for maybe like ...5 seconds? It all happened so fast, maybe have been a tiny more, a tiny less. I had my parts in my hand and pushed him away. My penis was not in his mouth, but not sure if his lips touched my penis at all. I saw a red spot on his lip, but claimed it was a burn from eating that was healing (Im inclined to believe him because I've known him awhile and I thought it was a nick in his shaving as it looked like something I've done to myself) 
So you know what my question is gonna be. What's my risk ?
Deep down I think there was none, I just think everything was just way too fast and brief to really transmit anything. 
Doesn't Herpes need to essentially be "Massaged" in? 

Correct me if I'm wrong, I just don't see 2-4 seconds doing anything even on the extreme chance he had some crazy visible sore. 

Experts help and thank you!