"If you want to pass this point alive, you must answer my riddle: What goes on four legs in the morning, two legs at noon and on three legs in the evening?" the Sphinx asked. Oedipus pondered for a moment, "Probably one of those new Pokemones," he finally replied. "There is like 600 of them. "Fair enough man," spoke the Sphinx. "I can't reasonably expect you to remember all their names. You may pass."
George came home from University in tears.
"Mom, am I adopted?"
"No of course not!", replied his mother. "Why would you think such a thing?"
George showed her his genealogy DNA test results. No match for any of his relatives, and strong matches for a family who lived the other side of the city.
Perturbed, his mother called her husband. "Honey, George has done a DNA test, and... and... I don't know how to say this... he may not be our son."
"Well, obviously!" he replied.
"What do you mean?" she asked.
"It was your idea in the first place" her husband said. "You remember, that first night in hospital when the baby did nothing but scream and cry and scream and cry. On and on. And you asked me to change him."
"I picked a good one I reckon. Ever so proud of George."