freaking out -groinal response

I am not sure of the mechanics of a male groin, but I am freaking out here.

I hate hugging people, especially males. It makes me very uncomfortable.

I had to hug this guy the other day and I was not comfortable w/ it.
The guy is bigger than me and he gave me a big bear hug.

Then, I felt this pulling in the right side of my junk. All the way down on the right. Maybe those are nerves or tendons? There was nothing sexual going through my mind. I was just uncomfortable. But I felt it immediately.

I did my normal checking to see if there was anything there, and it just felt tense on the right side all the way down the shaft. It wasn't numbness or wood....but it has me freaking out. Why did that happen?
Was it that I was so uncomfortable that my junk retreated inside my body?

Of course, my OCD is all over this. I can't close this one and move on.

It is funny, I had the exact same thing happen to me a week ago while I was just sitting at my desk...and I thought..these feels weird, but it is not arousal.