...you know that a good, long session of weeping can often make you feel better, even if your circumstances have not changed one bit. - Daniel Handler

If you were to take a plastic bag and place it inside a large bowl, and then, using a wooden spoon, stir the bag around, you could use the expression 'a mixed bag' to describe what you had in front of you, but you would not be using the expression in the same way I am about to use it now. Although 'a mixed bag' sometimes refers to a plastic bag that has been stirred in a bowl, more often, it is used to describe a situation that has both good parts and bad parts. An afternoon movie theater, for example, would be a mixed bag if your favorite movie were showing, but if you had to eat gravel instead of popcorn. A trip to the zoo would be a very mixed bag if the weather were beautiful, but all the man and woman-eating lions were running around loose.

Entertaining a notion, like entertaining a baby cousin or entertaining a pack of hyenas, is a dangerous thing to refuse to do. If you refuse to entertain a baby cousin, the baby cousin may get bored and entertain itself by wandering off and falling down a well. If you refuse to entertain a pack of hyenas, they may become restless and entertain themselves by devouring you. But if you refuse to entertain a notion--which is just a fancy way of saying that you refuse to think about a certain idea--you have to be much braver than someone who is merely facing some bloodthirsty animals, or some parents who are upset and find their little darling at the bottom of a well, because nobody knows what an idea will do when it goes off to entertain itself, particularly if the idea comes from a sinister villain. - Lemony Snicket

If you are allergic to a thing, it is best not to put that thing in your mouth, particularly if the thing is cats.