hey yorkietalkers

. im kinda confused about something ...
how come the term, "teacup yorkie" is incorrect, but "teapot yorkie" is correct?
if someone mentions that they have a "teacup", then people basically give them a 5 paragraph definition about why that term is unacceptable, but when someone mentions their "teapot", then people agree and act like its normal.
If one exists, why can't the other?
did i miss something?