I remember when I first heard of the concept that you should not discuss sex, politics or religion in polite company. My thought then, which I still hold now, is that polite company sounds pretty damn boring.
If you can't make interesting conversation without talking about sex, politics, or religion, that sounds like a problem with you.
It isn't a question of whether it is possible to have interesting conversations that do not involve those topics, I enjoy discussing a wide range of things. It is more that having forbidden topics as an indication of correct manners enforces a weird kind of false sterility on human affairs and I feel cheapens and narrows the culture that these manners claim to protect.
"Polite company" is just a polite term for people you don't know very well, but might not want to piss off.