Being that the anus is such a centerpiece to this side of sexuality, does it become acceptable to encounter certain levels of fecal matter during sexual encounters?

With heterosexual encounters, spur of the moment vaginal intercourse can be successfully achieved without preparation. I doubt homosexuals always use enemas after every visit to the toilet, or before every "spur of the moment" sexual encounter. So dookie on the penis and tongue has to be something tranny chasers are acquainted with, no?