what are some things that society still considers taboo?

Necrophilia

(nec·ro·phil·i·a - Sexual feelings for or sexual acts with dead bodies)

That must be at the *top* of the list for things you dont talk about in polite company!

Masturbation

Woman walking around topless is still frowned upon in public.

Cannibilism(certainly not a comforatable topic of conversation)

Open marriages

Kinky parts of private sex lives

Admitting to smoking pot on regular basis is still probably taboo.

Cheating on taxes

Details of how someone killed somebody else in a war..(Did you ever hear of a veteran talking about it ..hardly ever)

Admitting openly in public or at a dinner conversation of how many sex partners someone may have had.

Islam. They have made themselves hated all over the world! That is pretty hard thing to do people!

A brother and sister, or a son and his mother having sex.