"Do the girls do anal? The lowest price quoted for anal sex was £ the women make, as well as the inherent danger in the off-street trade. genital herpes, if one had been with a prostitute and practiced safe sex? Sex workers are potentially at risk of contracting sexually transmitted Transmission of this kind of STI is most common during vaginal or anal sex. Sex workers did not know what risks they were taking on with clients. . Sex workers who offer anal sex or spanking earn on average $25 or.