Observant males

Driving through town Big Brother spotted the familiar yellow-green brick of his school bus.
'There's my bus' he cried,' and look it is my bus driver,'
'She's very nice.' I said, thinking of all the times she lets me IOU the bus fare. 'But I don't know her name. Do you know what her name is?'
'Paul' he says after a pause.
Another pause. 'I didn't know she was a girl'.

Sitting at the dinner table. I smiled at Big Brother who was looking so angelic with his blue eyes. He's been very sweet lately, telling me every hour or so that he loves me. And will always love me, he assures me, even when he's naughty.
'Mum !' He exclaimed, 'you have gills! On your cheeks, when you smile! You're like a fish ! You can breathe under water! Look everyone - Mum has gills on her face - Here (he points to his cheeks)..... and there (he traces lines radiating out from both his eyes) and...there!" (He traces line after line across his forehead).
That's what they're from, alright, breathing while under water , isn't that what stress is? Keep calm and grow more gills.

Little Brother is more abstract in his observations. 'Do you know, mum ' he begins, ' do you know that when you jump off a cliff you should always wear a t-shirt.'
'Really?' I asked
'Especially, he continued slowly, sifting the thoughts in his head, 'if you are jump off a cliff and you don't have a parachute. Then, you always need a t-shirt. Because, you can always take your t-shirt up over your head like this (he demonstrates) and with one hand hold onto the sleeve and with the other hand, reach through and hold the other bit. And that will make a parachute.'
'Wow' was all I could think of.
'I've known that for a long time' he says.