Thats the kind of trouble which can occur when words either sound or/and are spelled in a certain way that may bear similarities and can be misinterpreted ; another example of that is the story of an elderly man who hired a college student to paint his house, telling him not to forget to finish the back porch as well. When all done, and the student came to collect his money he said : I really hope you like the job, and by the way, just so you know : what you have in the back of the house is a Mercedes, not a Porch . But its nicely painted over now.
p.s the punch line could have also been : your Porch now has a new coat of paint on it, I even painted the 911 lettering on the back of it,,