My friend asked me to house sit for her and feed her pet mouse while she's away. I'm going to ignore the mouse.
What do you have against mice?
I don't like the mouse and I don't think my friend will care.
Your friend is depending on you to feed her pet mouse while she's away. Ignoring that pet is cruel and the pet will likely die.
Why is it so wrong to ignore the cute mouse.
A mouse needs a lot of care. Ignoring it, even for the short amount of time that your friend is gone can be detrimental to the health of the mouse. You should take care of the mouse.