Carry your shopping Sir?

I said to the lad in Tesco 'Is it true that you'll carry shopping out to customer's cars free of charge?'

He said 'Yes'.

So I asked him to carry mine. We walked across the whole car park and, as we got to my car, I said 'To be honest, I only asked you because I'm really lazy'.

He said 'I gathered that...

Spoiler:

here's your Twix'.