Original sentence: Gender identity and transgender identity are fundamentally different concepts than that of sexual orientation.The majority of cross-dressers identify as heterosexual
Edited sentence: Evidence of HIV infection and other sexually transmitted diseases suggest that men who identify as 'gay', or MTF transgendered and the non-gay identifying sex partners of these in fact constitute a single, though diverse, group, not three separate groups, at least for the purposes of disease control.However, medical opinion in general and departments of public health and the Centers for Disease Control maintain that all sex between biological males, including MTF transsexuals is 'men who have sex with men'.One school of thought holds that transgenderism is a homophobic reaction to same-sex attraction by those who grew up in a culturally conservative social background; deeply conservative countries such as Iran offer gay men the coice of death or undergoing gender reasignment surgery; there is no doubt that MTF transsexuals are useful to patriarchal societies; firstly they can be used as 'surrogate women' by men who are unable to find a suitable female for oral or penetrative sex, and secondly as 'surrogate men' by mem who can have the opportunity to expolore their own homosexual desires without actually becoming a 'gay' themselves; these forces result in a demand for sex with MTF transsexuals that many are surprised to discover, but undoubtedly acts as a strong pressure in inducing and validating the transfomation for many individuals; indeed, many MTF transsexuals use the notion that they are able to obtain sex with 'straight' men as validation for the identity and decision to transform.The majority of cross-dressers identify as heterosexual although many gay-identifying men also cross-dress, and the distinction between cross-dresser and drag queen is possibly an attempt to enable some men to enjoy sexual play with other men without affecting their sexual identity