A sifu is a only a human being, and while they are supposed to be role models, they don’t have to lose their sense of humour.
As long as he doesn’t go about making those kinds of jokes in class, or trying out his oral chi injections on female students, then I see nothing wrong in him having a joke about it :).
If this is just an inter-club war like Fish of Death said, take it elsewhere.
Guns don’t kill people, I kill people
Why cant a sifu have a sence of humor
If you actual look at it at a different view maybe you will not be so affended. (Opps, forgot to bow in) I am sure classes are taught on this, probably in the east but the statement has a sound meaning. I toke it more on as a serious meaning that a joke. Get affend if you called you a Bi@#h, not if he is stating that from taoist readings. Maybe he did it in a unbecoming way, it’ll give you that…but it has a greater meaning than a joke. And if it was so what??? You don’t joke sometimes??? Sifu or not it should not matter.