Sex before marriage, adultery, bestiality, incest, and homosexuality are all serious sins against God. Jehovah God cannot lie. Every form of gambling is tainted by greed. So Christians do not take part in any kind of gambling, such as lotteries, horse racing, and bingo. Christians do not steal.
Uncontrolled anger can lead to acts of violence.
A violent person cannot be God's friend. Some people call on the power of the spirits to try to heal sicknesses. Others cast spells on their enemies to make them sick or even to kill them. The power behind all these practices is Satan. So Christians must not take part in any of them.