Sexual perversion include all except-
Sadism
Buccal Coitus
Urolagnia
Bestiality
Ans.D- BestialityBestiality (Sexual intercourse between a person and an animal) is an unnatural sexual offence (not a sexual perversion).Sadism- Sexual gratification is obtained or increased from acts of physical cruelty or infliction of pain on one's pa.Buccal coitus (coitus per as/sin of Gomorrah): In this, the male organ is introduced into the mouth, usually of a young child. Undinism (Urolagnia) is the term used when sexual pleasure is often obtained by witnessing the act of urination by someone of the same or opposite sex.