...Oh, I should be well aware you are not familiar with human society's rules or customs. Thus, it falls upon myself to explain, of course!

[ Chink. Then they tip the glass to take a bigger sip this time. ]

There are various reasons why someone would say such things. In some cases, to honor people, their grand acts which they have already committed, or otherwise champion their causes - to more or less place better emphasis behind the potential success in the endeavor. Such as, of course, a certain hard-earned victory that lies within reach.