Just giving it a bit more thought, ultimately it’s the potential for humiliation, the thought of my wife comparing my smallish willy with a magnificent monster cock, is an immense turn-on!
Good question! Turn on, I would say, the thought of seeing one in the flesh, is a real turn on! Whether my wife would enjoy something that large is another question!
Apologies for responding out of turn, but from a male perspective I’m fascinated by monster cocks, particularly their impressive size when compared to my specimen.