My son had been sort of skirting around the question for a while about the time he turned five.

At a trip to the zoo, I pointed out a coupe of turtles that were mating. I took the opportunity right then and there, and it was very easy and non-embarrassing. I pointed out that all mammals, bird and reptiles mate this way.

Last week we saw some butterflies mating, and I had the same conversation with DD5. She could not have been less interested.