It's no big deal!
My dick is no big deal, it's average. I wish it would hang like the dicks of those two dudes in the picture, but it seldom does. When I have a boner it's an average length. If I'm sitting around watching tv or in the spa it hangs loose. But as soon as I get up and I'm on my feet walking around doing stuff (making a meal, cleaning, etc) it shrivels up. I have never figured out why it does that. It's embarrassing.
Actually the penis shrivels up as a protective action, and also to keep it warm.
I often hear men complain about their penis shriveling up during various activities.
I myself have a small penis, but I am ok with that, and I have had lots of fun with my penis.
I know two guys who both have big penises, around 5 or 6 inches long when soft. Both of them say they wish they had a penis my size. One of the guys said he only gets three quarters hard, never gets a full erection. I'm happy with my penis.