Gentlemen are often sophisticated. Gentle, the word itself, mean both belonging to a family of high social station, docile and moderate. The life of high social class often encounter extremely complicated political affair. To survive in such complicated enviroment, gentlemen need political savyness. Thus people who are simple, and only speak of their mind strait will not have good chance to make it. So gentlemen are often very sophisticated.
Sophisticate mean 1 : to alter deceptively; especially : ADULTERATE
2 : to deprive of genuineness, naturalness, or simplicity; especially : to deprive of naïveté and make worldly-wise : DISILLUSION
3 : to make complicated or complex