Sorry!I should have been clearer, question 4 is not just about kinks that he does JUST for Yunlan, but maybe kinks he wouldn't come up with for himself and which he might turn out to enjoy as well? Just maybe not in a purely selfish way? So the last question is for kinks that he just wants for himself, if that makes sense (hopefully?).

Yes, some of these are not strictly kinks but more preferences, that's true.