My understanding, after five minutes of google searching, is that a “cock tribute” is when a male openly bears their cock, alongside a picture of a desired sex partner, fantasy, or whatever is making you tick. Then a picture with both the cock and a photo of the accompanying subject in frame is taken.
It seems to be common is to flop on, cover up, or (some overachiever) hold up a phone with your penis as the picture is on the phone; this helps with scaling the dick against a common object, as well as subliminally showing dominance, and sexual confidence. Cumming on the phone/photo shows that the power dynamic isn’t a competition, as reaching an orgasm can be read as accepting the absolute ecstasy, which generates control, being given by whomever/whatever is fucking it into you.
All in all, I think a tribute can be overwhelmingly enticing, as well as romantic, under certain circumstances. Showing a fellow human that their mere image, no matter if it’s a dimly lit, blurry photo taken at a bad angle, arouses you to the point of climax, is a hell of a compliment.
I’m actually seeing if my SO shares my thoughts on this, fingers crossed she finds it hot