Quite aroused, actually.

You feel your cock hardening at the sight of the picture and the story it tells. It easily pushes against your soft dress pants, and you immediately wonder how it would feel in a chastity device. You are curious. Immensely. Then again, you are not sure if you could gather the courage to ask anyone to try this on you. Certainly not your wife. Or… maybe?

You continue to stare at the painting, imagining yourself in the position of this man, who totally submitted to whoever his mistress or master is. He has accepted that his cock has been reduced to a useless tool of no further importance. If he is ordered to please, he will have to do it with… well, his tongue probably, as his hands are tied as well. You imagine being teased about your silly, useless cock, encaged in its confinement. Packed away. You wonder again if you would feel arousal, and how you would feel it. Like a constant itch waiting for release, probably. The cage might turn you into a quite horny person, turned into total submission by the promise of maybe being granted an orgasm someday. You close your eyes and moan softly, feeling your erection throbbing inside your pants.

But there is nothing you can do at the moment, so you bite your lips, throw one last glance at the fascinating picture and move on.