A man invents a machine that slaps anybody who lies. He tries it out on his family at dinner. He asks his son, “Why were you so late last night getting home?”
The son replies, “I was just studying at the library.” SLAP! “Fine, I was at John’s house watching TV.” SLAP! “Fine, porn!”
His father looks at him disgusted, “At your age I didn’t even know what p*rn was.” SLAP!
The man’s wife begins to laugh, “He’s definitely your son.” SLAP!