LEV246 Do not commit sodomy. Hashem wants the world to be populated. For a man to lie carnally with another man runs counter to this goal, for such results in the destruction of the male seed and serves no positive purpose whatsoever. Hashem forbids this act also because it is perverted, vile and disgusting in His eyes, as it is in the eyes of anyone who has any sense. Each of us is created to serve Him and a person should not degrade himself with such a vile and ugly deed.