[Esaias]

Back to the original question.

Men having sex with men is sin because God designed sex as the means of reproduction between a man and a woman. It is designed by God as the means for a man and womand to bond physically, emotionally, psychologically, and spiritually, as one. Gay sex is therefore "unnatural" and is a forsaking of the natural use of the woman as Romans puts it. Therefore God forbade it, and that makes it sin.

It is the homosexual act which is forbidden, not "loving" someone. Homosexuality so called is basically a misplaced boundary in regard to appropriate behaviour.

A man can love women but is not to fornicate or commit adultery. Same basic principle.

If he utterly refuses heterosexual marriage then he must remain celibate. Which is true for ALL men anyway.