we are saying the same thing

A man does not have to alway teach. LZ's concerned about another man touching his GF, at least the man can express his concern by offering to teach (if he's able to), or learning it very hard and seriously. Whatever his GF's incentives, you won't lose anything, will you? Simply begging and/or being jealous does not buy anything. At the minimum, you learn a skill. It's easier to say than to do it, of course.

Is your last name Xi? I'm suspecting something.