It's the story of a woman and her husband. When they have sex, the man always wants the lights to be closed.
So, one day, his wife asks him, "Honey, why do you want me to close the lights when we have sex?" and the man replies,
"I find it more exciting". One night, while they are having sex in the darkness, the woman decides to open the lights.
The first thing she sees is her husband, using a cuccumber to give her pleasure instead of fucking her with his cock.
She starts screaming after him, "What the hell are you doing? Don't tell me you've always done this instead of fucking me!!"
and the man replies, "Yes, I've always used a cuccumber when we "have sex". But, I'd like you to explain, where do our 4 kids come from??"