overheard conversations

I'm driving home, kids are in the back seat. I pick up the tail end of a conversation, something about fish breeding (I think, as we had just bought a fighting fish and I had been discussing with the stall holder about how could they breed when they kill each other!)

Georgie, in a final, no questions need to be asked, don't you know this ALREADY?,  tone of voice to her older sister:  "well, they fall in love and then they have babies!"

I am REALLY not looking forward to having "that" conversation with either of them. But it sure was funny to listen to at the time!