Perplexion

An perplexing erection -- a boner for which there is no clear source.

Genji's perplexion in line at the grocery drew the attention of the little boy nearby.

perplexion

The state you are in when perplexed.

We call Harry over who listens for a voice, saying “Hello, hello whoever you are”, into the mouth piece before passing it back with a you-got-me expression.
“Funny guys.”
He sees we’re not laughing.
“I’m in perplexion. Who was that?” asks Harry with a baffled expression.
I check the cell and the line’s dead.

Excerpt from chapter 29 of "Sixteen stories, no pets" by C.J. Beck