'What's this pink stuff?'
I looked up from swiping my card at the register to the teenager bagging my groceries. He held up a bottle, 'This pink-drink stuff, what is it?'
'It's grapefruit juice.'
'Yeah, I saw that - you mean like the same as the grapefruit you eat?'
I nodded, 'Yes. Same as the grapefruit you eat.'
I started bagging my own groceries while he digested this. Then, 'You need help out?'
And I started to laugh. 'I think I've got it.'
...after all, I've had my grapefruit today.