Little Johnny keeps asking his Dad for a television in his bedroom, to
his Dad keeps saying "No".
After all the nagging, he agrees and says, "OK".
Several nights later Johnny comes downstairs and asks, "Dad, what's Love,
Dad is horrified, and after looking at Mum who's also gobsmacked, proceeds
to tell his son about the facts of life, the whole works, warts and all.
Johnny now sits on sofa with his mouth open in amazement.
Dad asks, "So, what is it you've been watching then Son?"