Transvestism is a unique behavioral pathology that has nothing to do with sexual orientation.

I'm not sure wearing the wrong clothes is much of a pathology.

I’m not even sure the clothes are wrong..

Its classified as a pathology of gender dysphoria in the APA DSM-5.

* https://en.wikipedia.org/wiki/Pathology#Psychopathology

* https://en.wikipedia.org/wiki/Gender_dysphoria#Diagnosis

Nope, cross-dressing alone does not consitute gender dysphoria.

That is not what I claimed and it is not what the Wikipedia article claims.