Yes, he likely does. From the outside and from an LPSG
openness perspective, its easy to say he could just be really insecure about his dick.
On the other hand, there could be something more serious...like a physical anomaly that he doesn't want to share with everyone. Or, he might have been abused in some way earlier in his life and can't handle nudity.
It would be great if everyone was comfortable enough in their own skin to not need to go over-the-top in their privacy, but those of us who don't care who sees us naked sometimes need to step back and consider other circumstances that might cause such behavior in others.
There. Did I over-think that scenario enough?