Is kissing a CSW on mouth (with or without tongue) going to give STD if the the CSW also has some STD? It's not polite to ask the CSW if she has STD and it's not good to ask her to open her mouth to see for any sores.
If there is no sore on her area around lips, is it safe to think that she has no STD?
What about kissing neck, breasts, buttocks or her stomach? Is there any STD which can be caught doing this?