Excuse me, what does the common expression "gentleman" in the second element mean?

Starting from Xiong Ji, the character in Comic Book Day and Comic Book, Xiong Ji himself is a pervert, but every time he is arrested for being perverted, he will say a famous line, "I am not a pervert, I am just a gentleman played by xxx!" Later, it evolved into a "perverted gentleman", and later it became popular to write xx and read oo, and finally it evolved into a gentleman (perverted).