These can be deceptive. Play safe and assume the old person you've met is a witch or a wizard and get out of their way as soon as possible. You know it makes sense...
Test of Character
It is very common for folk to be asked to do something for someone else during their stay in the Fairy Kingdom. The realm is very good at getting others to work for it for nothing and will find ways of helping those who help it. Just something to consider before you tell the person who is looking for the proverbial needle in the haystack that you can't help them, you are in a hurry and must move on. Stop what you're doing and help them out.
These really do exist but think very carefully before you start eating it. The owner will be a witch. The sweets and other goodies that make up the house are there for a reason - to lure in the unwary who will not leave the property again. The witch does not eat sweet things. She prefers the meat course. Don't say you weren't warned.