"A person is not defined by a sexual orientation," said Bochanski" 

Oh yes they are says Rome:

“sexuality is not something purely biological, rather it concerns the intimate nucleus of the person” (The Truth and Meaning of Human Sexuality, Pontifical Council for the Family, 8/12/1995).

"Sexuality is a fundamental component of personality, one of its modes of being, of manifestation, of communicating with others, of feeling, of expressing and of living human love. Therefore it is an integral part of the development of the personality and of its educative process… Sexuality characterises man and woman not only on the physical level, but also on the psychological and spiritual, making its mark on each of their expressions." (Educational Guidance in Human Love, Congregation for Catholic Education 1/11/1983(?))

"there is no right to homo-sexuality" (sic) (Some Considerations Concerning the Response to Legislative Proposals on the Non-Discrimination of Homosexual Persons, CDF, 24/7/1992)