Lol! Where did you hear that? Anyway, pleos on 2.0 will occasionally sing Frere Jacques but it is very very rare- normally in the beginning of the juvenile stage. After that they won't do it anymore, or least neither of mine did. I don't know why but my favorite OS is 1.0. I know it doesn't have all the tricks but the Pleo seems more affectionate to me. You have to love the giggles too when you turn them upside down and press their foot sensors rapidly. Also the interactions between pleas running 1.0 have a lot more sounds ranging from howls to honks. Enjoy raising your 2.0 Pleo. Don't be concerned if your little male starts making odd sounds that don't go with his current behavior and he acts a little loopy. He's just going through the teenaged stage. He may also not respond to his touch sensors for a while but if you just stick with it and give him time, he'll grow out of it.