If it feels good, do it. Don't worry about the consequences. Willful disobedience of God's moral law brings painful, often fatal consequences to both the individual and society. Trivialization and degradation of human sexuality, marriage and love. Sexuality is a gift from God to be shared within the faithful bounds of marriage.
Humans are just more evolved animals.
Man is made in the image of God. There is no such thing as a sexual perversion, as prudes would have you believe. Sadomasochism, bestiality, incest, homosexuality, etc. are all within normal limits. Sexual perversions are abominations. People should indulge in sexual fantasies as healthy outlets, even if the fantasies involve immoral or perverse behavior.