Acts.15
[19] Wherefore my sentence is, that we trouble not them, which from among the Gentiles are turned to God:
[20] But that we write unto them, that they abstain from pollutions of idols (so that they would not offend the believing Jews (verse 5). Again, agrees to 1Cor 8), and from fornication, and from things strangled, and from blood.
[21] For Moses of old time hath in every city them that preach him, being read in the synagogues every sabbath day.
Acts.21
[25] As touching the Gentiles which believe, we have written and concluded that they observe no such thing, save only that they keep themselves from things offered to idols (so that they will not offend those weak in faith, as to 1Cor 8), and from blood, and from strangled, and from fornication.
Rev.2
[14] But I have a few things against thee, because thou hast there them that hold the doctrine of Balaam, who taught Balac to cast a stumblingblock before the children of Israel, to eat things sacrificed unto idols (to know and purposely eat things sacrificed to idols. It is the intent as 1Cor 8 explains), and to commit fornication.
So you see, Scripture and not ism tells us what we need to know.