“More Physically or Pyschologically Vulnerable From Being Only One Naked?”
If those feelings (both of them) are wearing off, being tied up can help restore them! (In my current profile photo, my wrists are gaffer-taped. I did that more to prove to myself that I would go through with it, but I was only there with one other person who did the tape and took the photo. It was exciting, but would have been very different in a public space.)