Your walking a very thin line. Due to the "nature" of your work .. You risk your parnters ( both paid and your loved one) health each time you perform your job ..

Not all STD's are covered by use of condoms ... HPV is one that can lead to cervical cancer and genital warts for both parties plus added risk for penial cancer depending on the strain of HPV there are hundreds and condoms have no protection because its transfered skin to skin.. Just some food for thought.

Good luck in whatever you decide to do.