HCV is not generally transmitted sexually. Most people get it from IV drugs, transfusions, needle sticks at hospitals, etc.
Not likely but possible, i.e. both people have cuts or bleeding gums while kissing.
Open sore in mouth and on other persons private areas during oral sex.
Open sore on finger and menstrual blood present.
HCV is a blood to blood virus. It has to enter someones blood stream to be infected.