a female has mastered the art of aiding a man in reaching an orgasm, usually frequently in one sexual encounter, by an means of penetrative and non-penetrative sex
"man, I had an incredible night with this chick last night, she got me off so many times, I was defenceless against her skills, she was a master cockstress!"
A persons guiding ethics in regards to their cock. A persons cockscience stops them from having intercourse with undesirables. However in some cases a persons cockscience does not exist which is the reason the lower class exists.