Went into town today, bought a new rucksack. Didn't look inside before buying it.
Got it home. Opened it up to look inside and there is a purse inside. Purse has a price sticker on for £9.99.
Now I suppose I've technically stolen this purse, although I didn't put it in the rucksack in the first place.
So I should take it back, right? But I wasn't planning to go to town again for another couple of weeks, I don't have time/inclination to make a special journey.
You're all going to tell me I have to take it back, I realise that.
But it would be OK to wait until I'm next passing, right?