I don't see what's tilting about it?
For the record I'm Person B. Person A gave me a tenner but it actually came to less than the estimated £20 so I owe a couple of quid back which got us into the conversation of how you'd generally work this out.
I'd generally just split it but that's not always fair based on distance. Thought it was an interesting one mathematically.
If I was Person B I would expect and accept nothing from Person A. I'm going to spend the £20 anyway, so it makes no difference to me if someone gets a lift to a point on my journey that doesn't inconvenience me in any way.
If I was Person A I would buy Person B a pint next time I saw him.
What if it wan a journey you both made every day?
If I was having to make the journey regardless, it still wouldn't bother me if someone was being dropped off on the way.
I would probably be strict about not waiting for them though, them being in the taxi wouldn't have to inconvenience me in any way if they were getting a free ride home.Most tilting statement on blonde ever.
I thought, for once, you were asking a serious question.
Silly me. Lesson learnt.
What makes you think it wasn't a serious question?
PS- This is a serious question.