`  :This source provides some further enlightening information: ::``Three hundred thirty-two MTF transgender persons (112 African American, 110 Latina, and 110 API) completed the survey. ... The 3 most common self-identified genders were female (36%), preoperative transgender (31%), and preoperative transsexual (21%). Few had undergone sexual reassignment surgery; among them, 73% identified as female and 24% as postoperative transsexual. A majority identified as heterosexual.`` :This points out an interesting thing.  The large majority of the transgender individuals in the survey were pre-operative.  Since the only receptive intercourse available to them is oral, or anal, they are more likely to engage in URAS.  Honestly, I like the idea of ``URAS``, it should be: ``People engaging in URAS`` as the risk category... and we could avoid this whole ``who's male who's female`` idiocy.   `