The entire human race is corrupt. He provides a solution to corruption, namely through faith in Christ. First by facing Him, identifying our sins and recognizing He has provided a solution at the Cross, and changing our thinking from what we had been thinking to simply faith in Him.
Homosexuality, as described in Romans 1, may also be a natural result of those who have rejected God once they knew Him.
Rom 1:21-32
(21) Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
(22) Professing themselves to be wise, they became fools,
(23) And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.
(24) Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves:
(25) Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.
(26) For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
(27) And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.
(28) And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
(29) Being filled with all unrighteousness, fornication, wickedness, covetousness, maliciousness; full of envy, murder, debate, deceit, malignity; whisperers,
(30) Backbiters, haters of God, despiteful, proud, boasters, inventors of evil things, disobedient to parents,
(31) Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:
(32) Who knowing the judgment of God, that they which commit such things are worthy of death, not only do the same, but have pleasure in them that do them.
Great scripture, but Paul isn't just talking about "those" people - he's talking about ALL OF US - the whole human race.
Sure, I've been "washed by the blood of the Lamb", but I still sin, my spirit still wrestles against my flesh, I still "do what I try not to do, and don't do what I know I should do" - not all the time, of course (that would make me a Democrat!) - but my eyes can linger too long on that young girl in the office, I'll swear at that guy that cut me off in traffic....