Actually, scientists have found several genetic markers which lean toward a genetic disposition and cause for homosexuality.
In point, homosexuals are born that way.
But most here would immediately denounce any evidence provided because of their bias and bigotry.
Oh really? Then, can you please explain why homosexuality is considered as a sin in Islam? And, it's not some tom, dick and harry's fatwa.
While you are at it, could you also explain why Hazrat Lut's (A.S) followers were punished for succumbing to homosexuality?