The section 377 of IPC is intended to punish certain unnatural offences like sodomy, buggery and bestiality. The offence consists in having carnal knowledge against the order of nature by person with a man or in the same unnatural manner with a woman or by man or woman in any manner with an animal.
Section 377 IPC says,
“Whoever voluntarily has carnal intercourse against the order of nature with any man, woman, or animal, shall be punished with imprisonment for life, or with imprisonment of either description for a term which may extent to ten years, and shall be liable to fine”.