"Do not have sexual relations with a man as one does with a woman; that is detestable."
Leviticus 18:22
Gay men have anal or oral sex with each other. "as one does with a woman" clearly means a vagina is involved. Men, even gay men, do not have vaginas. this clearly means that men are incapable of having sex with each other in the same way as a man has sex with a woman. I wonder if Leviticus knew that. Probably not.
What Leviticus meant and what he wrote are two different things. We should be careful about what we believe.