Section 12. (1) A person who commits buggery is guilty of an offence and is liable on conviction to imprisonment -

(a) for life, if committed by an adult on a minor;

(b) for fifteen years, if committed by an adult on another adult;

(c) for five years, if committed by a minor.

(2) In this section "buggery" means sexual intercourse per anum by a male person with a male person....〔(Sexual Offences Act )〕

Section 15. (1) A person who commits an act of serious indecency on or towards another is guilty of an offence and is liable on conviction to imprisonment -

(a) for ten years, if committed on or towards a minor under sixteen years of age;

(b) for five years, if committed an or towards a person sixteen years of age of more....

*
*
*
*

(3) An act of "serious indecency" is an act, other than sexual intercourse (whether natural or unnatural), by a person involving the use of the genital organ for the purpose of arousing or gratifying sexual desire.〔