Inspired by McTag and at the behest of Merry Andrew, I bring you Homophone/Homonym Corner; the place to share examples of amusingly misused homophones that you've found in printed matter or made up yourself.
Examples:
I went over to Farmer McTag's to see his children and
they're pigs.
Though he was Mormon, the doctor tolerated any religious
sex with unusual
patients.
List of 411 homophones for inspiration:
http://www.bifroest.demon.co.uk/misc/homophones-list.html (courtesty of Mr. Hinteler)