I have known very firmly in my heart that I have had S.S.A. since I was 12 (being 22 now). Whatever it came about as a result of, it certainly felt like a natural urge - until I started reading Aquinas. Once he had convinced me that God exists, that great saint gave me a framework of logic. He argued that everything has a specific place, an order or hierarchy in the Universe. All things have proper objects, material objects, goals, meanings, and positions under the one true God.
Since all things can be classified and understood through the natural light of reason (except things pertaining only to faith), it followed that even homosexuality can be understood. The more I delved into Aquinas’ moral theology about right order, the more I doubted the fitting nature of my homosexual urges. Now, I’ve been convinced that it is not rightly ordered with the generative faculties God gave us as human beings. Homosexual lusts and acts simply do not fit with the grand universe of laws and workings that God has made.
Just look at sexual intercourse: sex is not for pleasure first, nor for love primarily, but for children. Love and pleasure may come into it, but they are not essential to the ontological divine purpose, which is to bring more souls into the world for the praise of the Lord. As homosexuality cannot naturally acquire this end except through heterosexual proxies, it must be considered disordered and quite pointless. The entire point of gay relations is mutual love (if serious) and/or pleasure (if less serious), not children.
These feelings are temptations from the Enemy. Only the manly valour of St. Michael and the virtuous chastity of St. Mary can help us, with fortitude and hope, to overcome them. Having been afflicted with same-sex attractions for years now (without knowing it was an affliction), every day I am acutely aware of the damage they do to my soul.