When money is exchanged for the handling of, viewing of, or using of the mouth on breasts, the involved pair of breasts are known as "prostititties". An active prostitute's breasts are also known as "prostititties".
I could only get prostititties off of that girl last night. (because the person had to pay to get boob)
Those look like prostititties to me. (because the woman appears to be a prostitute, and her breasts are probably visible)