Father and his 5 year old are walking thru the park and see 2 dogs humping. Little boy asks his dad, "what are those doggies doing"? Dad answers "they're making puppies son". Late that night the 5 year old wakes up and goes into his parents bebroom and they're goin at it missionary style. The 5 year old asks, "what are you doin"? Dad replies, "We're making babies son". The 5 year old says, "turn her over, I want puppies".
Luck is Preparation meeting Opportunity