Have sex with a dog ONCE, but no one knows you have...(or will ever find out, only you and the DOG know)
or
NEVER have sex with any dogs, but EVERYONE in the World believes you have (everyone believes you had sex with 1 dog once, nothing you can do to disprove it)

or
NEVER have sex with any dogs, but EVERYONE in the World believes you have (everyone believes you had sex with 1 dog once, nothing you can do to disprove it)
