Frasier: Go ahead, let's hear it.
Niles: I'm not going to tease you. I'm grateful. You could have ratted me out to Daphne, but instead, you protected me... just like a big sister should.
Frasier: You know, I'm glad this tickles you.
Niles: I shouldn't make fun. You people have been persecuted long enough as it is.