The bottom line is: if no one involved in said scene had any STDs or was infected with anything then it doesn't make a difference if they were gay, transsexual, black or white. It may not be my personal preference to do or to watch but for someone to jump to conclusions simply because someone has unprotected sex with a gay or transsexual individual is sort of silly in this day and age. Not every gay and transsexual person is a cesspool of venereal disease.
Or at least, that's what I hear.