in the old days in Asia, when you setup martial art shop, you have folks come and ask to "teach them", i.e. a polite way of asking for a fight. those darn Asians were pretty polite up until they kicked your ass. methink, Ueshiba had experienced this sort of things many times.
personally, those who can kick my ass, i'd learn from them; those who can't, i'd learn from them too.

on the other hand, whichever other hand, those who can kick my nuts, that would just be war!
