Cannibalism with consent; an offence?

Two Dutch tv presenters ate a piece of (bum) meat of each other (for their, yet to be aired, new television program).
This broadcaster is (in)famous for their publicity stunts, so it could be a hoax, but for the sake of the question let us assume they really did (they showed teasers which contained pans and meat, for what it is worth).
In some countries, I believe, it is illegal, in most it is a taboo, or at least frowned upon.
Do you think it is all okay if consenting adults decide to take a taste of each other’s limbs (or whatever part)?
If it is illegal in a certain country, could they or others that try it in that certain country be prosecuted ?