[Jorge]

Let me ask you a simple question. Why would a heterosexual man prefer anal sex with another man to vaginal intercourse with a woman? The former is completely unnatural to a biologically heterosexual man.

Actually it is biologically unnatural for ALL men, because it violates God natural design and created intent for human sexuality.

[CodeMonkey]

It would not be unnatural for a homosexual man. Your response doesn't answer the question of why would a man who is naturally attracted to women freely engage in something as painful and unnatural as anal sex with another man instead of pursuing a woman. That's the one question none of the people who feel it's purely environmental have seriously tried to answer. Why would men do that? It's disgusting to heterosexual men and it's painful for the person on the receiving end. There is no good reason for why men who have never been abused would naturally prefer that over a sexual relationship with a woman.

[GraniteStateConservative]

It can be "unnatural" or abnormal and be genetic.